International Conference on Coastal and Delta Areas
Impact Of Accented Speech On The Credibility Of International Exchange Courses; Challenges For Exchanging Knowledge And Experience In The Erasmus + Program
Rotterdam University of Applied Science(RUAS) and Sultan Angung Islamic University (UNISSULA) have established a professional exchange program, stimulating staff mobility and student mobility. While these exchanges have enriched our educational program, students report difficulty with processing information from the non-native English speaking lecturers.Speakers with a (heavy) accent are sometimes perceived as part of an out-group. Even without prejudice about out-group members, this has a negative impact on the credibility of the received information. The influence of accent on credibility poses a challenge on our exchange program, both for students and lecturers.In this article, several suggestions to a different approach are mentioned. First of all, the credibility challenge needs to be recognized.Futhermore, a program and famework for intercultural competence could provide students with tools to improve communication and cooperation. Lastly, students may demonstrate a more positive attitude and affect when listening to friends, compared to lecturers. The opportunities for student mobility should be maximized. This article explores the impact of accented speech and the challenges this presents to the exchange program of RUAS and UNISSULA, and gives suggestions to improve the benefits from student mobility and staff mobility. Keywords: education, international exchange, accented speech
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The Development Of Intermodal Transportation In Cirebon
The progress of a nation is seen from its transportation conditions". This proverb is familiar to us, but it is difficult to realize. The development of technology and information requires a development in the field of transportation. In the context of human movement and goods, a system that regulates its movement to be effective and efficient from origin to destination safely, comfortably, and timely is needed. The term of intermodaltransportation or combined transport system is directed to achieve the effectiveness and efficiency of the movement. Cirebon as a gateway of movement from West Java to Central Java or vice versa is rich in transportation modes. Geographically, its location is strategic with the development of transportation requirementfor air, road and rail modes as well as seaand river transportation modes. The potency of this area is very abundant, ranging from the potency of agriculture, plantation, fishery, tourism and other potential areas that are well known both domestically and internationally. Of course, it requires transportation facilities and infrastructures to support the distribution of the produces. Related to it, the local government has made a transportation planning program that is actually very supportive forthe regional and its potencydevelopment that exist. However, it is needed to have synergy and integration between one transportation mode planning with other modes of transportation due to the limited funds available in local government and central government. It is necessary to develop cooperation between the government and the private sector in realizing the development of intermodal transportation in Cirebon. This paper tries to illustrate the opportunities for the development of intermodal transportation in Cirebon in improving the economy and development of West Java Province, especially Cirebon. The problem discussed here is the long time needed to go to the cities in Central Java (PANTURA track) and also on the existing causeway because of the excessive loads that burden the road, and the condition of damaged roads. In addition, another transportation mode opportunity other than road mode can be an alternative distribution of transportation; thereby it reduces the burden of highway mode. It is expected that the proposed recommendation can be an input for the improvement of transportation system in Cirebon. Keywords: Transportation, Intermodal, Cirebon
Bending capacity of reinforced concrete beam with a rough aggregate of 2/3 teak pieces
The development of science, especially in civil engineering, demands a better concrete technology. Replacing the rough aggregate with teak pieces of length 2 cm, width 3 cm, and height 2 cm was tried to reduce the weight of the concrete. This wood was selected because of its light. The testing phases included: testing of concrete cylinders and testing of reinforced concrete beam bending. The bending beam test was done by making a specimen with dimension of beam: width 120 mm, height 150 mm, and length 1200 mm. The main reinforcements used were 2Ø10 mm and 3Ø10. For the chock, Ø6-50 reinforcement bar was used. On the test of concrete cylinder results with soaked rough aggregates, it was found that compressive strength at 28 days old was 5.09 MPa and 4.74 MPa for non-soaked aggregate. On the test of reinforced concrete beams with 2 pieces of tensile reinforcement, it was found the average maximum load of 26300 N and average deflection of 6.99 mm. The average of reinforced concrete beam with 3 pieces of tensile reinforcement was 30500 N and average deflection of 8.66 mm. The bending strength of reinforced beam with 3 pieces of tensile reinforcement average was 5.34.106 Nmm. The comparison of calculation result between experiment and theory was found that load and moment for 2 pieces of tensile reinforcement was 0,72%, while comparison between load and moment for 3 pieces of tensile reinforcement was 0,58%. Keywords: teak wood, lightweight concrete, load beam capacity.
The Influence of Position and Number of Longitudinal Connection of Sengon Glulam Beams Towards Strength and Stiffness
The demand of wood as construction material always increases. However, sawn-wood with large size is more difficult to find in the market due to decreasing in stock dimension. In addition, it makes price more expensive. Indonesia has many trees from fast-growing species: however, they have low wood quality, and still limited in usage. To obtain a better performance of fast-growing species as construction material, it needs to be combined to produce glulam. This research observed the influence of position and longitudinal connections of wood glulam beam on strength and stiffness with damage species of sengonglulam beams. Preliminary testing was done to obtain physical and mechanical properties of clear specimen of sengon wood, testing method followed ISO-1995 standard. Fifteen glulam beam specimens whichhad 70 mm wide, 200 mm depth, 3000 mm length were constructed: They represented variations of position and connection work of 0 %, 25 %, 50 %, 75 % and 100 %. Each layer of lumber glued with thermosetting phenol formaldehyde (PA-302) adhesive at pressure 1 up to 1,1MPa for 10 hour pressing time. The static lateral loading steps were done continuously until the beam was damaged. The result indicated that sengonwas V class of strength. Glulam testing showed that in terms of strength and stiffness, the higher the number of connections, the lower the value. The strength reduction percentages of 0%, 25%, 50%, 75% and 100% produced 0%, 13,08%. 28,11%. 29,42%. 70,72 %. Respectively and the degradation of glulam stiffness were 100%. 99,92%. 87,86%. 83,06%. 67,08%. The failure of glulam beam with 0% had a shear followed by flexure damages of 25%, 50%, 75% and 100%. A flexure damage was followed by shear damage. Keywords: Paraserianthesfalcataria, Connection, Glulam Beam, Strength, Stiffness.
Effect of Material ConductivityThermalto Sea Water Evaporation in Solar Desalination
Sea desalination technology with solar energy is very suitable to be utilized in Indonesia to produce fresh water with low production costs. In order to speed up the evaporation process, a suitable material is needed to be used as a seawater pan. Therefore, the purpose of this study is to determine the appropriate material to be used as a place of sea water. This research uses trapezium bowl with aluminium, copper, rubber, and glass material with surface area of 31.5 cm2 and 250 ml of water. Data collection from 10:00 am until 14:00 pm for five days. Environmental, material, and water temperatures are measured hourly. In high material conductivity such as copper (319.25 W/m.°C) and aluminium (16.95 W/m°C), the evaporation was 33.96 and 30.48 ml. While rubber (0.13 W/m°C) and glass (0.15 W/m°C) which had lower conductivity, also have lower evaporation, that was 27,68 and 27,83 ml. Thus, in desalination process by using solar heat, conductivity of container material affected the amount of water that evaporates. The higher the thermal conductivity value of the material then the volume of evaporated water would also be greater. Keywords: keywords desalination, evaporation, sea, water, solar
Identification of Diesel Resistant Bacteria that Isolated from Ship Dismantling Area in Madura Coastal
Ship dismantling activity is one industry that caused diesel contamination in environment. One of technology that can be used to remediate diesel contaminated area is bioremediation. Bioremediation can be conducted using bioaugmentation technique. The objective of this study was to identifity of diesel resistant bacteria using biochemicals test methods. The seawater and coastal soil samples were collected from area study using a sterilized bottles. All samples were shaker at 150 rpm for 1 h, after that samples were taken and serially diluted from 10-1 to 10-7. The diluted sample was inoculated on nutrient agar plates by pour plate method. The plate was incubated for about 24-48 hours and the growth of microorganisms was noted. Bacteria with difference of colony morphologies were selected. The cell morphology was determined microscopically after Gram-stain preparation. The isolates were identified using Microbact GNB 12A and 12B (Oxoid, UK) identification kit. This is a miniaturized computer aided identification system for the identification of organisms belonging to the genus Acinetobacter and Vibrio. Keywords: bacteria, bioremediation, coastal, seawater, ship dismantling
The ability of Avicennia marina (Api-api putih) to Uptake Heavy Metal of Chromium at Wonorejo Coastal in Surabaya
The increasing of industries and population growth are the main sources of contamination in the river. Wonorejo river is one of rivers in Surabaya that flow to east coast Surabaya. Concentration of Chromium (Cr) at estuary of Wonorejo River was 0.0325 mg/L and it was 2.7761 mg/L in sediment in 2007. Meanwhile, Cr at east coast of Wonorejo was 0.418 μg/L, it was indicating that upper than standart for biota in sea, 0.005 μg/L (KepMenLH No. 51 tahun 2004). In this research will be measured concentration of Cr from sediment and roots of Avicennia marina at Wonorejo River estuary. And then, it was calculated Bio-consentration Factor (BCF) value of A. marina. Transect method was used to determine the sampling point of mangrove root A. marina and sediment at estuary of Wonorejo River. Mangrove and sediment roots were analyzed using the Atomic Absorption Spectrophotometer (AAS) method, previously samples of roots and sediments were extracted using the wet destruction method. Parameters supporting in this research were measured include temperature using thermometer, salinity using salinometer and pH using pH meter for sediment. Based on the results, the average concentration of Cr in the sediment in transect 1 were 47 mg/kg until to 66.5 mg/kg. The concentration of Cr in roots of A. marina were 28 mg/kg until to 92.25 mg/kg. The BCF value in A. marina were 0.89 to 1.35. Based on the BCF value, it indicated that A. marina was a hyperacumulator species for heavy metals of Cr. Keywords: Avicennia marina, BCF, coast, chromium, root, sediment
Analysis Of Slope Stability Using Bamboo As An Alternative Slope Reinforcement (Case Study In Kaliwungu – Boja Street, Darupono Village, Kendal District)
Bamboo is a plant that can be found in Indonesia, however the utilization of bamboo as a structure material is rarely to use in our society. This study was conducted with the objective to analyze the performance of bamboo with respect to soil stability. Bamboo was used as an alternative soil reinforcement to landslide in Kaliwungu – Boja street, Darupono village, Kendal District. Two kinds of bamboos analyzed here were Betung and Tali bamboos having diameter 20 centimeters and 15 centimeters respectively. The index and engineering properties of a soil from Boja street were tested. To analyze the safety factor of the slope of Boja street, Plaxis v.8 and Slope/W were used. The result showed that 1) from soil test the cohesion (c) is 50,995 kN/m2, phi (φ) is 36o, γsat is 16,374 kN/m3, and γunsat is 12,534 kN/m3. 2) the safety factor of the slope in natural condition using Plaxis v.8 and Geostudio (slope/w) is 1,32 and the safety factor with traffic loads is 1,26 – 1,29, with these safety factor, the slope will slide because the safety factor is <1,5. Therefor, the slope strengthened with bamboo, so the safety factor of the slope increased to 1,77 - 1,87. Keywords: Betung Bamboo, Tali Bamboo, Slope, soil reinforcement, Plaxis, Geostudio
The Analysis of Liquefaction Potential Based on A Comparation of Various Cyclic Resistance Ratio
Prambanan Temple located in the Special Region of Yogyakarta is one of the most beautiful temples in the world. One of the potential geo hazards in the region of Prambanan is the earthquake. Geotechnically, the condition of the soil layer in Prambanan Temple consists of fine and uniform sand. Therefore, there is a possibility of liquefaction, if it receives the earthquake load. This study was aimed to investigate the condition of the subgrade of the Prambanan Temple foundation against the potential of liquefaction. Analysis of liquefaction potential in Regions Prambanan was conducted using semi-empirical method which were the cyclic stress ratio and cyclic resistance ratio with data from the field test results, Standard Penetration Test. The calculation of the value of peak ground acceleration was conducted using various empirical formula. The parameters of the liquefaction threat were based on Liquefaction Potential Index, Liquefaction Risk Index and Liquefaction Severity Index. The analysis showed that the peak ground acceleration value based on the 2006 Yogyakarta earthquake with a magnitude of 6.3 was 0,216g. Based on the condition of existing Prambanan temple with ground water level at -12 meters depth was safe against liquefaction threat. In case of an earthquake with greater strength than the 2006 Yogyakarta earthquake, with a PGA of 0.3 to 0.4g and shallow water level (-1 meters), then liquefaction might potentially occur. Keywords: Liquefaction, Cyclic Stress Ratio, Cyclic Resistance Ratio, Peak Ground Acceleration, Prambanan Temple
Technical Economy Study on Jurang Jero Small Dam Construction Project In Blora Regency
One effort to improve the water resources sector in the field of water needs is to build a container of water reservoir either in the form of natural container shelters like situ or artificial storage containers such as small dam. The aim of this research is to know the benefits of Jurang Jero small dam construction in terms of technical economic aspects obtained from irrigation water and raw water for Jurang Jero small dam construction project. The research method is descriptive quantitative with NPV analysis technique, Net B / C, IRR and sensitivity analysis. Quantitative data in the form of project costs, agricultural and fishery data are needed to calculate project benefits. Primary data retrieval technique using interview. Keywords: ekonomi teknik, small dam, Jurang Jero
The Influence of Coastal Protective Building against Erosion in Sayung Coastal, Demak
In 1980, land conversion of mangrove occur in large numbers since the opening of the Causeway. Flooding and Rob have already begun to be felt since the year 1995 and beginning in 2000 has been sinking a Dukuh village near by Bedono. Year 2000 erosion occurred in district Sayung, Demak and in 2013 the large area known erosion area of 400 – 1300 acres along the coastline. To reduce and overcome the damage done by the shore, re-purposed soft structure (conservation) and hard structure (breakwater). The purpose of this research is to know the influence of the building protective coast against erosion. The method used is the quantitative methods i.e. include survey field and numerical modelling methods. Research results in the form of changes in the rate of erosion in Coastal Sayung Keywords: Coastal, Coastal Building, Erosion, Sediment.
Deflection Of Rigid Pavement Nailed Slab System With Lateral Loads
Indonesia is a country with a soft land area of about 60 million ha or about 30% of the total land area of about 198.6 million ha. Soft soils include peat soils, clay soils and other soft soils scattered throughout the province in Indonesia. If a rigid pavement or flexible pavement rigid pavement layer is built on soft soil without prior repair on the ground, it will be damaged as cracks in the concrete or wavy in the asphalt layer, this is due to soft soils, Which is not uniform which can cause damage to the pavement layer. Rigid pavement with nailed slab system is one solution to overcome the frequent breakdowns of soft soils, and it is hoped that using pavement models will increase the pavement strength when placed on soft soil. This pavement consists of 15 cm plates and 1-2 m long poles, 15-20cm in diameter, which are monolithically coupled with plates. From the results of several previous studies that pavement is more resistant seen from small plate deflection when compared with without using a pile or anchor. But due to repeated lateral load will cause a gap between the pile and the subgrade around the pile that can reduce the friction value along the pile so as to reduce the modulus of subgrade reactions. Keywords : modulus of subgrade reactions, lateral loads, soft soil
Repairs Of Expansive Land For Sub Grade Roads
Subgrade is the most important part in laying the building structure, especially for road construction. The improvement of the quality of road facilities is carried out with initial planning on good pavement layers and should consider the type and strength of subgrade. Road conditions are often damaged in the structure of the road surface layer because it is caused because the structure of the soil in the area often experience shrinkage causing the road becomes cracked and even waving. It is therefore necessary to experiment to stabilize the soil by improving the gradation of mixing the original soil with a larger graded material of rice husk ash, in several experiments with several samples and aggregate mixture to find out the free press value on soil tested both before and after stabilized. The test results showed free press value of comparison between mixing using inorganic salts and lime has increased soil bearing capacity. From the results of this study can be concluded that the addition of the right stabilizer material on expansive soil is good enough to be used to improve the physical and mechanical properties of expansive soil. Keywords: Subgrade, expansive soil, soil stabilization, stabilizer material, soil bearing capacity
The Analysis of Dimensional Changes and The Number of Simple Composite Girder Dimoro Bridge On The Southern Coast Access In Malang East Java
Accelerated development of cross-coastal access to southern eastern Java, known as the South Coast Cross Lane (JLS) very dependent with the topography of the southern region of Java island, about 65% of JLS are in mountainous and coastal areas. One of them is the construction of Dimoro Bridge in Malang East Java region with simple composite girder type spans 20.00 meters. According to basic design, girder dimensions use IWF. 980 x 350 x 10 x 35, with the number of girder n = 7 and the girder length 20.40 m. The issue of girder dimensions IWF. 980 x 350 x 10 x 35 is not mass-produced by the steel industry, so there needs to be a design review with the dimensions of girder in the steel industry market with IWF. 800 x 300 x 14 x 26. The analysis of dimensional changes and the number of simple composite girder is reviewed from : (1) the height of the girder profile approaching plan (d), because when the smallest (d) value is taken there will be more number of girder (n) installed. (2) the weight of the bridge structural steel approaching plan (Wr), since if Wr' < Wr means fulfilled by not changing the calculation of the bridge foundation, if Wr' > Wr then it is necessary to recalculate the strength of the bridge foundation. Analyze results for bending moments on IWF girder. 800 x 300 x 14 x 26 is obtained : M precomposite = 43850 kg.cm, M post-composite = 13816200 kg.cm. The moment of resistance (wb) due to Mpre and Mpost = 5003 cm3. Moment of inertia (Ix) = 282554 cm4 (table Ix = 292000 cm4). The moment of resistance (wx) = 7064 cm3 (table wx = 7290 cm3). Control of ultimate stress σau* = 2780 kg/cm2 is obtained Mmax = 12030000 kg.cm, σa' = Mmax/wx = 2405 kg/cm2 > σa = 1850 kg/cm2, the stress σa' exceeds the permit stress σa but still below ultimate stress σau* (safe). Control of deflection, for L/250 obtained Ix = 157733 cm4 < Ix plan = 282554 cm4 (safe). For L/360 obtained Ix = 201819 cm4 < Ix plan = 282554 cm4 (safe). Control of the shear stress obtained T = 229.76 kg.cm2 <T'= 0.58xσa = 0.58 x 1850 = 1073 kg.cm2 (safe). Control of tensile stress and press on composite girder, compressive stress σsu = 389.7 kg/cm2 < σa = 1850 kg/cm2 (safe), tensile stress σsl = 1123.3 kg/cm2 < σa = 1850 kg/cm2 (safe). Preferred on the composite girder is the compressive stress (σsu), and the resulting compressive stress (σsu) after the composite is smaller than the allowable stress (σa = 1850 kg/cm2; σau* = 2780 kg/cm2), the dimensional change IWF girder being 800 x 300 x 14 x 26 is safe to use. The change of girder number to IWF 800 x 300 x 14 x 26, profile area F = 261 cm2 (table F = 267 cm2), girder weight per m wt1 = 261x0.785 = 205.00 kg/m' (table = 210.00 kg/m'), weight 1 girder Wt(p) = 4100 kg. Needs of girder n'= Wt7/Wt(p) = 9.40 → taken 9 girder, Wt9 = 36900 kg < Wt plan = 38556 kg (ok). Accessories on the composite girder include : connection plate + bolt, diaphragm (bracing iron elbow) + bolt, shear-connector. Total weight of Accessories 9 girder = (3692+215+737) = 4644 kg. Total weight of composite bridge steel structure 9 girder Wr = 36900+4644 = 41544 kg < weight plan Wr = 41635 kg (fulfilled by not changing bridge foundation calculation). Keywords: pre-composite moment, post-composite moment, ultimate stress, deflection, shear stress.
Risk-based Maintenance Model for Road Network
Road is an asset for a country to develop. To be able to serve until its planned service period road needs maintenance. On the other hand maintenance does needs budget to deal with. As budget for maintenance is limited, cost optimization becomes very important. This research used risk-based maintenance model and multi-criteria decision making and weight method for a road network. For this study we chose a road network comprised of seven roads. The road network comprised of jl. Sirodjuddin, jl. Prof. Sudharto, jl. Setiabudi, jl. Gombel Lama, jl. Gombel, jl. Teuku Umar and jl. Dr. Wahidin. The data we needed came from assessing each road’s surface condition and questionnaire where some professionals in civil engineering actively involved. From the data we gained and analysed, we found a risk category for each road. From the risk category we would be able to develop maintenance action plan for each road. Based on the maintenance action plan, cost optimisation will be achieved. Keywords : road maintenance, risk-based maintenance model, road network, analytical hierarchy process
Passport Data Based On Time Series Neural Network Prediction
Globalization has encouraged changes in people's lifestyles. The rapid flow of globalization between countries increasingly opens opportunities for each country to develop its economy. Level needs begin to shift, from secondary or tertiary needs into primary needs, such as a vacation or a trip, including travel abroad. The mobility of the population abroad for a holiday or business trip is also increasing, this will affect the busyness in the immigration office that has a very important role in terms of public services in the field of immigration. The number of immigration visitors is fluctuating and unpredictable, when will there be spikes that cause problems and high risks. To maintain the credibility and quality of service, the immigration office needs calculations in forecasting the number of passport makers when there is a surge of visitors in order to remain able to provide optimal service to visitors. This study uses the technique of forecasting Backpropagation Neural Network forecasting The superiority of Neural Network as a system is capable human thinking by computational intelligencebased computing in pattern recognition that is useful for modeling, predicting, detecting faults and controlling systems that require a design approach with computational artificial intelligence. Keyword : Passport, Neural Network Algorithm
Analysis Of Effect Of Human Resources, Allocation Of Funds, Materials, and Construction Equipment On Performance Of Road Maintenance In Jepara Regency
The availability of adequate facilities and road infrastructure is one indicator of community welfare. Jepara Regency Government through road maintenance program trying to keep the road condition to stay steady. Human resources, allocation of funds, materials, and construction equipment are the main factors determining road maintenance performance. This study aims to identify and analyze these factors so that it can be known the effect on road maintenance performance in Jepara regency. The results of the analysis conducted on the sample of respondents totaling 90 people showed that: 1) Human resources, allocation of funds, materials, and construction equipment respectively partially have a positive and significant impact on road maintenance performance; 2) Human resources, allocation of funds, materials, and construction equipment simultaneously have a positive and significant impact on road maintenance performance. Keywords: human resources, allocation of funds, materials, equipment, maintenance
Sedimentation Handling Model Of Sediment Reservoir On Darma Reservoir Das Cimanuk – Cisanggarung Kuningan Regency
Reservoir is a water reservoir in a watershed which is used to irrigate agricultural land, fisheries, water regulator (flood controller), watershed catchmentdams channeled by outlet (river) to the reservoir so as not to flow and stagnant in places beneath it and used for drinking water, as well as tourism. As one of the efforts to overcome the flood, it is necessary to revitalize the water structures as a shelter for rainfall runoff and sediment storage building.This research took a case study at Darma Reservoir. In this study, the analysis was performed using Hydrologic Engineering Center-River Analysis System (HEC-RAS). Based on the simulation results of the existing conditionflow, there is a water runoff at River Station (RS) 10 and RS 9. Hence, the design of sediment reservoir building is performed by using Homogeneous Dam as a prevention of overflowing in Darma Reservoir leading to Cisanggarung watershed. The calculation of water potential is based on Rainfall data, while irrigation water demand is calculated based on irrigation total area, water requirement standard for rice plant and crops, industrial water requirement standard based on BWRP Guidelines, Dit.Jen SDA, drinking water requirement standards based on Dinas Cipta Karya and the standard of fishery needs based onDirectorate of Irrigation. One benefit from the calculation of water discharge is for flood control. Measure to be able to control the overflow of river water so it is not too abundant at certain times that can cause flood is to know how much value of the water discharge. The conditions of water that remain in control can be profitable for the fishing business there. The calculation of the discharge can also indicate a response due to changes in bio-geophysical characteristics that occur in a watershed (by watershed management activities) or changes (seasonal or yearly fluctuations) of the local climate. It can later be useful for the subsequent management of the watershed in accordance to the law of natural balance (ecology) which ultimately creates environmental sustainability. The maintenance of watershed ecology is very beneficial to keep the fishery business running in this water body because the ecosystems in it live with supportingconditionfactors (Asdak 1995). Keywords: Reservoir, DAS. Sedimentation, HEC- RAS
Simulation of Coastal Erosion Model to Support Disaster Mitigation in Coastal Sayung, Demak District
Coastal Sayung, Demak has occurred agricultural land and mangroves conversion for opening the ponds. Land use change inflict 2 small villages sink, namely Tambaksari (1997) and Rejosari (2004). The small villages are damaged by coastal erosion. This coast is an area affected by tides. The study aims to evaluate the erosion in coastal Sayung, by simulation model with mathematic model. The simulation results are calibrated with March and June 2016 bathymetry data. Bathymetry data is obtained by echosounder to acquiring contour depth. Wind data was obtained from NOAA for 10 years. Sediment sampling results indicate the type of silt (72%), clay (24%), and fine sand (4%), with specific gravity 1.51 – 1.85 tons/m3. The data used for hydrodynamics and erosion modeling with mathematic model. The simulation results indicate the greatest erosion value occurs in the transition season I, which is 94,000 m3. Patterns of erosion strongly influenced by the current patterns of a particular season. When the West, current and erosion patterns move towards northeast, and otherwise with the East. The most eroded villages are Sriwulan and Bedono, then Timbulsloko, and the smallest is Surodadi. The results of this study can be used to support disaster mitigation in the coastal Sayung, Demak. Keywords: bathymetry, coastal Sayung, erosion, mathematic model, sediment
Evaluation Of Transportation Performance Of City Transport in Tegal City
The problem of public transportation service in Tegal City is not yet optimal performance of urban transport service and border transportation caused by route of circular route so that public transportation service user will going in the opposite direction of difficulty obtaining public transportation. And not optimal network route performance caused by several route routes that overlap with other routes so that minimize Load Factor The proposed structuring of urban transport network and border in Tegal City 8 routes (2 urban transport routes and 6 border transport routes) to 14 routes consisting of 9 urban transport routes, namely A1, A2, A3, A4, A5, A6, A7, A8, A9 and 5 border routes, Tegal - Slawi, Tegal - Banjaran, Tegal - Pasar Bawang, Tegal - Kemantran and Tegal - Jatibarang . Keywords: public transportation, circular route, opposite direction, overlap
Analysis of Land Subsidence (Land Subsidence) Affects Against Water Puddle In Semarang City
Land subsidence is a natural phenomenon that occurs in the young soil layer (alluvial). The incident is bad for the construction that is above it, it is also exacerbated by the entry of seawater that enters due to the soil surface that has been declining so that the ground elevation is below sea level elevation.Semarang city is one of the cities located in the north of Java island that the condition of the land in the city is alluvial soil. Semarang's coastal topography is flat in the range of 0-2% with most of its area almost equal to sea level and even in some places below it. The results of technical geological investigation in North Semarang city showed that the subsurface layers up to 25 m depth consisted of heavier soil types 1.7-1.84 t / m3, silt with 0.200 0.448, & clay. The predictions of subsidence using the 1D Terzaghi approach with the T90 obtained the smallest decay of 19.6 cm over 8,624 years and the greatest collapse 127.7 cm for 29.634 years, while using the smallest 216 cm subsidence Geostudio program for 8,624 years and the greatest descendant of 135.9 cm for 29.634 years. Keywords: Land Degradation, Digital Elevation Model, Rob's puddle
Bitumen Modification Using Buton Natural Rock Asphalt
In Buton Island, an island located in South-East Sulawesi Island in Indonesia is found about 700 million tons natural rock asphalt (NRA) which have not been maximally utilized yet. Buton-NRA contains 20 to 30% of bitumen. This paper reported the experimental study on utilizing of Buton-NRA as additive of bitumen binder in hot mix asphalt (HMA) mixtures. Amount of 5, 10, 15, 20, 25% of very fine of Buton-NRA was added into the bitumen, resulted Buton-NRA-Bitumen’s binder. Penetration and softening point test were conducted to get penetration index (PI) value, an index to determine the temperature susceptibility of the binder. The results show that the Buton-NRA-Bitumen’s binder has low temperature susceptibility. Used as binder in HMA mixtures also shown that the Buton-NRA-Bitumen’s binder can improve the performance of the mixtures. Marshall Stability and stiffness of the mixtures are higher compared to that of base bitumen binder, especially Buton-NRA-Bitumen’s binder with 15% of Buton-NRA, Marshall Stability reaches 1620kg and stiffness 142kg/mm, while HMA mixtures with base bitumen (0% Buton-NRA) only has 1068kg of Marshall stability and 110kg/mm of stiffness. Keywords: Buton-Natural Rock Asphalt, Binder, Improve, Performance, HMA mixtures.
Toward Green, Clean and Sustainable Environment
The purpose of this paper is to create an appropriate waste management model for UNISSULA that proclaim a clean, green and sustainable environment based on waste processing for economic value and ecological enviroment. A brief overview of the concept includes development of management system of regional waste, education & waste management & WMS training, waste handling, waste processing and utilization of waste processing products. However, UNISSULA's concept has some weaknesses that must be overcome in order this concept could be running well such as: capacity of garbage, area, infrastucture (grabage fleet) and smart cards and automatic container system. It is therefore, needed cooperation with Semarang City Government' that is by collaboration concept of UNISSULA with Semarang City Government’s concept to ensure the input capacity, and people support. As a result, the creation of a vicious circle of urban rubbish management namely, economic stimulation, clean environment, government income and people income and economic structure. Besides that, this concept is expected to improve economic citizen through economic value added of waste. The next is expected to change the culture, urban lifestyle, green behavior, clean environment, transportation and income, and farming, fruits and vegetables industry. Keywords:Waste Management, Value added, Clean Environment, Sustainable Growth.
Cost Of Study Reinforced Concrete Structures, Structural Steel And Steel Combination Structure - Concrete (Depo Archives Building Case Study District Jepara)
Office buildings in its development always use a reinforced concrete structure. Very few and rarely encountered office buildings using steel structures, whereas steel structures are very easy and fast to use with very simple tool installation tools, so it saves procurement costs and time. For that reason it is necessary to review the material used in the determination of the cheap cost in a design of the building structure, in this study take case study of Depo Archive Building of Jepara Regency with level three (3) floor, the part of structure that is reviewed is column, platform. This study uses design design method and unit price analysis method based on Indonesian National Standard (SNI). The design results calculated with SAP 2000 if it is stated strong, then proceed into the calculation of costs. The results of these cost calculations are compared with six combinations of structures using different materials ie Type I (concrete columns, concrete blocks and concrete plates), Type II (concrete columns, concrete blocks and plates using bonded), Type III (concrete columns, steel and concrete plate), Type IV (concrete columns, steel beams and plate using bonded), Type V (steel columns, steel beams and concrete plates), Type VI (steel columns, steel beams and plate using bonded), where the cost the cheapest is on the Type IV structure at a cost of Rp. 851,922,778.91 and the most expensive cost on Type V structures at a cost of Rp. 1,724,793,719.48. Keywords: material, cost, structure concrete, structure steel, plate floor.
ANALYSIS OF CHANGE IN THE AREA OF INUNDATION DUE TO LAND SUBSIDENCE IN SEMARANG (A Case Study: Jl. Ahmad Yani, Jl. Erlangga Tengah, Jl. Sugiyopranoto)
Semarang is located on the north coast of Java island and develops in river flow area which genetically has alluvial materials. The process of precipitation continues until now and as a result a fairly thick layer of clay is founded. The layers of clay and land subsidence are related to each other. Land subsidence causes inundation or locally called rob area becoming increasingly widespread. The process of land subsidence causes a loss for the government of Semarang. The purpose of this study was to analyze the change in the area of inundation due to land subsidence in Semarang, on Ahmad Yani Street, Central Erlangga Street, and Sugiyopranoto Street, and give the best advice for the government to develop the city. Method of analysis used in this study was terzaghi method, GIS software (Geography Information System), and Plaxis software. The results showed that the rates of the land subsidence is getting bigger and the time is getting longer. Keywords: Land Subsidence, Terzaghi, Geography Information System, Plaxis
THE TRAFFIC ANALYSIS ON THE SIGNALED T-JUNCTION (A Case Study Of Purwokerto Indah (Purin) T-Junction, Kendal)
Purwokerto Indah T-Junction (Purin) is one of the T-Junctions located in the district of Kendal. This place is found to be a signaled T-Junction and belongs to education and housing area. Looking at its function, it connects Jl. Tentara Pelajar with Jl. Soekarno-Hatta, the main road of North Beach (Pantura). In the rush hours, especially in the Morning and in the Afternoon, this site becomes crowded and vulnerable to conflict due to being located on the area of Jl. Soekarno-Hatta, the main road of North Beach (Pantura). In order to meet the need of this research, surveys on the flow of traffic, type of vehicle, Geometry of road, and phase of traffic on the T-Junction were conducted. These surveys were made on Sundays, Mondays and Wednesdays at 06.00 to 18.00. The T-Junction performance analyses were made by referring to MKJI where it included the level parameter of saturation, postponement, and T-Junction services. Of the data analyses, the intersection performance values at the peak condition were found to be at the south area of Jl. Tentara Pelajar with the level of saturation (DS) 0.937, and the total of delay 61.827 seconds/unit of passenger car that it belonged to service level D. For the west area of Jl. Soekarno-Hatta, this had the level of saturation (DS) 0.937, and the total of delay 57.528 seconds/unit of passenger car, where this belonged to level D in term of service. For the east area of Jl. Soekarno-Hatta, the level of saturation (DS) was 0.937, and the total of delay was 80.374 seconds/unit of passenger car. It means, the average of intersection delay in the T-junction, Purin, Kendal was 34.27 seconds. This further explains that the service level of Purwokerto Indah (Purin) T-Junction, Kendal belonged to level D. Keywords : MKJI; Signaled T-junction, Service Level
THE INFLUENCE OF LAND SUBSIDENCE TO THE CHANGES OF INUNDATION WIDTH IN SEMARANG CITY ALLUVIAL PLAINS (Case Study: Northern Districts of Semarang)
Semarang city is geographically consisting two units of morphology, namely: in the southern part is a denudasional structural hills consisting of Tembalang, Tanah Putih, Tegalsari, Siranda, until Gajah Mungkur. While the alluvial plain lies in the northern part. Land subsidence in some parts of Semarang city becomes a serious problem, because the area is generally a settlement area. As a result of land subsidence, settlement areabecomes lower, because the settlement location partly close to the beach, during a tide it overflows into the mainland through rivers and drainage canals and then it pooled to the settlement. The purpose and goal of this study is to assess and predict the large and length of land subsidence on alluvial plain due to the load and the mechanical properties of the soil as well as to assess and predict the changes of the inundation width in the alluvial as a result of land subsidence. This research use experimental method. To test the analysis of alluvial sediment subsidence, it is obtained by the calculation based on samples and primary data in the laboratory. The calculation is done in two ways, the first way is calculating the physical model with 1D Terzaghi, while the second way is predicting the subsidence using PLAXIS software and the result is the prediction of the large and length of subsidence with load variations and different soil mechanical conditions. Furthermore, comparing the calculation result using a physical model with the calculation result using PLAXIS software to get the final result of how is the large and length of land subsidence and the tendency of the subsidence. Whereas to calculate the width of the inundation, it is planned the changes of the inundation width using GIS software (Geographic Information System). The result of this study which applies 1D Terzaghi approach, obtained the smallest subsidence is 64,2 cm for 17,781 years and the largest subsidence is 107.600 cm for 29,635 years. While the approach which applies PLAXIS software obtained the smallest subsidence is 65.8 cm for 17,781 years and the largest subsidence is 110,000 cm for 29,635 years. The subsidence tendency more northern is larger and the time is longer. Land subsidence in the alluvial plain continues to rise, therefore the inundation in the settlement that located close to the river and the beach continues to grow wider, between 2016 and 2045 there is additionalinundation of 493,63 Ha. Keywords: Alluvial, Subsidence, Inundation, GIS, PLAXIS
The Handling of Tidal Flood (Rob) with polder system
Rain often causes inundations in the area of Semarang. Currently,drainage system in the area of East Semarang is strongly influenced by the presence of tidal water. It causes the social and economic losses due to the inundation of rob that floods the northern coast of Central Java. Therefore, some studies are necessary to overcome the problem of flood and rob that exist. The mitigations of tidethat get on the land (called rob) are also needed. To remove the flood of East flood canal Normalization (BKT), Tenggang River and Sringin River, pumps with detention pond are required. Modeling designis done by using HEC-RAS application program for modeling river water flow, and RiverAnalysis System (RAS), which is created and developed by Hydrologic Engineering Center (HEC). The appropriate flood control and handling systems are polder systems, with the infrastructure components of sea dams utilized as protection against tide (rob) towards the mainland of Tenggang River watershed and Sringin River watershed. The rainwater expenditure falling in the watershed uses pumps and detention ponds. Keywords: Polder, Drainage City, Dam
Effects Of Mixed Asphals With Feldspar Filler Modification On Oil Asphals
Each composite material in a pavement mixture gives different variations of characteristics and performance, therefore it is still necessary to test the variations of the material to find the suitability of the use, so that by testing it can contribute information about the use of materials that can be used as an alternative in reference to choosing a replacement material This study aims to determine the characteristics of marshall using asphalt binder modified polymer AC 50/70 by using the material of feldspar stone ash, in terms of Marshall stability, flow VF, VIM (Void in Mix), VIM (Void in Bix) VMA (Void in Mineral Aggregate), MQ (Marshall Quotient), and. Density, This research uses hot mixed asphalt test (Hot Mix) with Marshall method. The asphalt content used was 4%, 4.5%, 5%; 5.5%; 6%; 6.5%; and 7% with each variant made 5 specimen. Implementation of the research was conducted at Civil Engineering Laboratory Faculty of Engineering, Islamic University of Sultan Agung Semarang. Implementation stages include aggregate examination (fine aggregate and coarse aggregate), filler examination, manufacture of asphalt concrete mix test and test using Marshall method. Keywords: Asphalt mixture, feldspar, filler, Asphalt oil
The Analysis Of Risk Management Of Projects With Lumpsum Contract System and Unit Price Contract System Using AHP Method (Case Study Of Contractors In Semarang City)
In the construction project implementation, the contract is a bond between the project owner as the service user and the implementer / contractor as the service provider. The contract outlines the forms of cooperation, whether technical, commercial, or legal in a clear and detailed way. A fair contract should balance the rights and obligations between the two parties. So both parties should look at the articles in the contract so that the things that pose risks can be avoided. In the project implementation, the usual contracts are Lumpsum contract and Unit Price contract. The method used is Analytic Hierarchy Process (AHP) Method. The analysis process begins by defining the problem, and creating a hierarchical structure. This hierarchy consists of 3 (three) levels of objectives (level I), criteria (level II), and alternative (level III). Based on the hierarchy and then compiled questionnaires, Questionnaires were distributed to 71 respondents consisting of contractors in Semarang. The data obtained are then tabulated, followed by pairing matrices, pairing comparisons, measuring priority weights for level II and level III, and checking for consistency. This means that projects with lumpsum contracts are at higher risk of losses compared to unit price contracts. The Based on the result of cost swelling risk analysis, we get the priority weight for lumpsum contract equal to ≥50% and contract unit price ≤50%. Keywords: Risk, Methank, Analytic Hierarchy Process (AHP).
Analysis Slope Stability And Seepage Logung Dam – Kudus Central Java
Logung Dam is located in Dukuh Slalang, Tanjungrejo Village, Jekulo District and Dukuh Sintru, Kandangmas Village, Dawe District. Logung Dam has an area of inundation of 144.06 ha and a normal catch of 20,150,000 m3. This analysis is to know the safety of the slope and seepage with the result of the approaching analysis so that it can give it to the dam. Zone analysis conducted with the location of the dam, physical testing of the material in the clay laboratory (zone 1), sand (zone 2), random (zone 4), show the results indicating the soil as the analysis material meets the dam requirements. Analyze the data required by the planner's consultant in the laboratory. Soil parameter data used in PLAXIS 8.6 and Geostudio 2007 programs: cohesion, c; Sliding angle in soil, φ; Slope angle, ; nd he eigh o Â he ol me o land, ; od l s o elas ici , ; ermea ili , ; nd poisson ra io, rom soil parame er da a can e o nd nialai cohesion c Â Â Â Â , shear orce φ Â Â Â Â Â Â Â Â , slope angle Â Â Â : Â upstream, 1:35 do ns ream and ol me eigh Soil Â Â Â Â Â 6 rom L XIS da a a Â he al e o deformation = 26.46 m, active pore pressure = -927.61 m, effective soil voltage -2.70x10-3 kN / m2; down slope safety = 1, 26 and seepage = 46,41x10-3 From geostudio program can obtain upstream slope safety factor = 1.41, downhill slope security = 1.23 and seepage = 63.30x 10-3.Air dam safety analysis to normal safe, For seepage safety by grouting or injection of cement on the ground beneath the foundation along the dam. Keywords: Analysis, Security Factor, Plaxis and Geostudio
Buton Natural Rock Asphalt (BNRA) Modified Base Course Material
In flexible pavement, base course is the layer immediately under the wearing surface layer. Because the base course lies close under the pavement surface, it is subject to severe loading. It follows the materials in a base course must be of extremely high quality. To get high quality of base course, research on treated base course with Buton Natural Rock Asphalt (BNRA) have been conducted. Amount of 10, 15, 20, 25, 30, and 35% BNRA by weight of base course aggregate are mixed in the base course aggregate. California Bearing Rasio (CBR) and direct shear test are performed to the mixed of BNRA-base course and also to the original base course to konw how far the influence of BNRA to improve the strength or quality of the base course. The test results show that with BNRA 25% the CBR value can increase from 52.30% to 98%, and cohesion change from 0.127 for original become 0.199 for base course treated BNRA, as well as angle of internal friction (φ) increase from 210 to 430. It can be concluded that BNRA is suitable to use as material for treated base. Keywords: Buton-Natural Rock Asphalt, Treated, Base Course, Improve, Strength.
Review of Recycled Asphalt Utilization (Rap) for Road Pavement Recycling
Technological developments and advances in road construction are increasing with the creation of technologies in faster and more efficient road construction. One of the asphalt recycling technologies is the use of Reclaimed Asphalt Pavement (RAP) which is hot hot mixed material from the excavation of cold milling mixed with certain additive materials to improve the quality of asphalt for longer life of asphalt because it is considered faster and to reduce continued damage within a short time after repair. This recycled asphalt mixture research aims to know the value of AIV and APV values of each mixing variation. The percentage of RAP used is 23%, 27%, and 31%. Based on the result of research, it is found that RAP aggregate still fulfill the required physical characteristic ie AIV value equal to 6,6% and APV value equal to 20,4% and minimum type minimum weight 2,5, so tends to be more stable at same condition indicated by the stability value is large and the flow is not too low for the AC-BC mixture, but the gradation of RAP aggregate is not suitable for AC-WC mixed specifications so it needs gradation improvement. Keywords: Reclaimed Asphalt Pavement (RAP), AIV value, APV value, aggregate gradation
The Influence of Seismic Load to Deformation of Dam
Disaster mitigation due to seismic load (earthquake) needs to be considered. This is especially for dam structure used as a reservoir and water resource. Because of the main function, and building dimension is too large, thus if the dam collapse it will cause a significant catastrophe for the surrounding community and environment. One of the seismic damages to the dam is deformation. This paper presents the effect of seismic load on deformation of dam model simulation. This study took place on the Sermo Dam, Yogyakarta which is located close to Opak Fault –as the suspicious cause of the earthquake in Yogyakarta. Seismic loads used in this study in terms of acceleration time histories. Therefore model can be carried out using PLAXIS simulation. This selected seismic load variations are on the range 5.0-7.0 Mw and epicentrum distance is also restricted in 15-31 Km based on the nearest epicentrum distance between Sermo Dam and Opak Fault. Keywords: seismic load, deformation, dam, modeling
CHARACTERISTIC OF EXPANSIVE CLAY SOIL (Case research at Bugel Village, Godong Subdistrict, Purwodadi Regency, Central Java Province)
Almost all civil constructions were built on the ground. However, not all soil types can be used for construction due to the load supporting capacity of the soil and the soil deformation that occurs for each different soil type. One type of soil that has many problems on its supporting capacity is expansive clay soil. It is a type of soil that has a mineral content that easily absorbs water in wet conditions and also release water easily in dry conditions so that is soil can swell and shrink in a relatively short time. The purpose of this research is to know expansive soil characteristic in Bugel Village, Godong District, Purwodadi Regency, Central Java Province covering physical and mechanical properties. Based on laboratory tests, the soil in Bugel Village has Waverage = 60.90%. From result of atterberg limit test obtained result LL = 90,75%; PL = 24.138%; SL = 23.759%; And PI = 66.612%. According to Raman with a PI of 66.612% already shows the soil is expansive ground. For Gravity Specific the results is 2,782, indicating the soil contains Montmorillonite minerals that have high passivity properties. The AASTHO classification of soil is incorporated into groups A-7-6 whereas for USCS classification is incorporated into CH zones and for English classification is entered into the zone between CV and CE. Of the three classifications can be drawn the clay soil area has a high plasticity value. For standard compaction test result, the characteristic value for maximum γunsat = 1,389 gr / cm2, γsat maximum = 1.78 gr / cm2, Woptimum = 31,46%, and n = 58,92%. And for soil swelling test can be seen the percentage of swelling is very high that is about 274%. Keywords: Soil Charactreristic, Expansive Clay Soil, Montmorillonite, Bugel Village.
The Study of Economic Feasbility Project of Embung’s Establishment in The Case to Supply People Needs of Water Sources (Study Case Project of Embungkalimati, Bapangan-Jepara District)
Embungkalimati was a water building which utilize the stream water remains. Embung is located in Bapangan village, Jepara district. Embung establishment is functionate to supply people needs of water sources. Embungkalimati has 280 m of length with depth excavation upstream between 4,80 m and downstream about 2,60 m with wide of pool storage 22.950 m2. Embungkalimati could save 115.890 m3 of water volume. The capacity of water storage is 107.000m3. this study is purpose to calculate the costs of embung’s establishment, to find out the benefits and analixing the economic feasibility. Economic feasibility is calculated by comparing the benefits and the costs of benefits and costs rasio (B/C). The result of this study found that the costs of establishment is Rp 21.964.132.000,00. The calculate of the costs based on the price tag of water is B/C>1, it can be obtained the costs water Rp2.280/m3 for B/C 1,07, IRR 11%, the sensitivity is increase up to 10% and the benefits decrease up to 10% which is can be said that it was impact to the value of the costs and benefits. The Payback Period is still the same with the 8th year. So, it can be concluded that the project of Embungkalimati’s establishment project was appropriate for economics. Keywords: Costs of establishment, Price tag of water, B/C, IRR
Influence Of Angularity Of Grains On Suffusion Process In Clayey Sand
About 46% from 136 dysfunctions of surveyed dams has related to internal erosion. Internal erosion is a phenomenon that is not fully understood, although it’s makes dysfunctions in dam’s structure. Two main phenomena responsible for erosion of particles in soil are backward erosion and suffusion. This report deals with suffusion process, which takes place inside the soil matrix. In suffusion, finer particles of a soil migrate within its own pore spaces be-tween the larger particles. These fine particles can be cohesionless particles or clay particles. With the objective to study the effect of angularity of coarse fraction grains on suffusion, a series of tests was performed on different clayey sand. Five sand types samples were tested which are different angularity of grains and same grain size distribution. Two experimental devices were used: one to characterize the grain shape and the second to quantify the influence of the grain shape on suffusion. Mechanical method was used to characterize the grain shape. By using a triaxial erodimeter, the suffusion sensitivity of five mixtures of kaolin-aggregates was determined. Results clearly demonstrate that suffusion process depends on the grain angularity of coarse fraction. With a constant flow, angularity of coarse fraction grains contributes to increase the suffusion resistance. Keywords: internal erosion, suffusion, triaxial erodimeter, angularity
The Prediction of Broad Puddle Change Based on Land Subsidence Analysis in Semarang
Semarang is the capital city of Central Java that has a population about 1.3 million people, the position of Semarang is very strategic as a regional transport. Semarang is divided into 2 parts namely Semarang Upper area and Semarang lower area. The soil layer of Semarang lower area is dominated by soft alluvial soil layers that continue to occur compression. These conditions effect this area most likely get the environmental impact caused by land subsidence. The objective of this study was to determine the large and duration of land subsidence that occurred in Semarang Barat district and its influence towards the area of inundation. The analysis of this research used 1D terzaghi method and plaxis software which then in overlay using GIS which yielded map of subsidence in the area. The calculation results that used 1D Terzaghi, the land subsidence of Mediterranean Housing was 91.11 cm for 27.11 years, Ronggolawe area subsidence was 24.40 cm for 18,50 years, and Jendral Sudirman area was 10 cm for 15,94 years, while using plaxis 8.2 software, the Perum Mediterania was 93.40 cm, Ronggolawe area was 26.22 cm, Jendral Sudriman area was 13.68 cm. Changes in the area of inundation in 2017 to 2047 amounted to ± 924,74 ha. Keywords: Land Subsidence, 1D Terzaghi, GIS, Plaxis
Feasibilty Analysis Of South Java Road Link in Jogyakarta Province
Distribution of goods and services along the island of Java still mainly depends on the North Java Coastal Road named PANTURA. Trafict demands along this road are increasing every year and road capacity can not match this growth. The government of Indonesia has plans to develop another trans Java route to meet the demands and to develop the southern corridor of Java. The province of Jogyakarta will experience an impact and needs to provide input to the proposed route, as the road can support development of existing regional potencies. The objective of study is to analyze the economic feasibility of fourth alternative southern Java road route in Jogyakarta province there were evaluated. This analyzewere based on estimated producer surplus of agricultural commodities within influence area. Keyword : feasibility study, South Java road link, producer surplus, agricultural potency, Jogyakarta
Design Of Pavement Using Buton Natural Rock Asphalt Stabilized Subgrade Soil
The performance of pavements is governed by the strength of the subgrade, because subgrade is roadbed soil where the pavement structure is laid. If bearing capacity of the subgrade high, deformation of pavement will not occur and it is not easy to deteriorate. In the contrary, if bearing capacity of the subgrade low, pavement deformation will occur and pavement will deteriorate. This research have objectives to analysis the pavement structure of using existing subgrade soil and using subgrade stabilized with Buton Natural Rock Asphalt (BNRA). The road connecting Semarang - Purwodadi where always in worst condition was used for study in this research. Semarang – Purwodadi road is laid over montmorillonite expansive clay with lower bearing capacity or have low CBR value only 1 to 2 %. To analysis the pavement structure, both flexible and rigid pavement, AASHTO 1993 pavement design are used. The result show that flexible pavement structure laid over stabilized soil have thinner pavement structure compare to the one laid over the subgrade of original expansive clay soil. Similarly for rigid pavement, the thick of concrete slab over the subgrade of expansive clay is 30 cm, and if laid over the subgrade of stabilized expansive clay with Buton Natural Rock Asphalt (BNRA) is only 25cm. It can be concluded that Buton Natural Rock Asphalt (BNRA), have significant influence to the strength and bearing capacity of expansive clay soil. Â Keywords: asbuton, stabilized subgrade, expansive clay soil, AASHTO
Analysis Of Effect Of Performance Of Public Works Department In Jepara With Balanced Scorecard Method And Regression Analysis Method
As a government agency with the largest budget utilization in the Government of Jepara, the Public Works Department of Jepara is required to demonstrate its performance optimally in meeting the needs of the community in the field of development. One of the efforts to monitor performance and maintain consistency in performing the task is performance measurement. The Balanced Scorecard (BSC) method and regression analysis method are used to design performance measurement systems to determine performance indicators appropriate to the organization's vision and mission. The purposes of this study are 1) to measure the performance of DPUD Jepara with Balanced Scorecard concept and concept of linear regression analysis with four perspective. 2) analyze the most dominant variable that affect the performance in DPUD Jepara. This study uses descriptive method with quantitative qualitative approach. Data collection is done by distributing questionnaires. The sample of study is 88 respondents. The results of study through Balance scorecard analysis with 4 perspective indicates that (1) Finance perspective include effectiveness, efficiency, and also budget transparency in good value (2) Customer prespectives include employee quantity, employee competence can reach optimum. (3) Internal business process perspective is considered good. (4) Learning and growth perspective is good because of salary conformity with work load, the existence of reward and punishment system. While through linear regression analysis showed that the four perspectives have an effect on Performance In DPUD Jepara. This result can be seen from result of ANOVA test or F test that show value of F arithmetic equal to 345.860 while value of F table equal to 2.48. The most dominant variables are finance perspective, internal business process perspective, learning & growth (infrastructure) perspectives. Keywords: Performance, Balanced Scorecard, Regression Analysis
Flood/Rob Handling Study with Polder System In Port of Tanjung Emas Area Semarang
Tanjung Emas Port is located in Semarang City which is the Capital of Central Java Province. Port of Tanjung Emas has a very vital role in supporting the economy of Central Java and surrounding areas as the entrance and exit of goods both regionally and internationally. But the problem of inundation, especially in the port of Tanjung Emas Semarang is a routine problem that can not be resolved and become a scourge for the port service user in the port. The purpose of this research is to know the management of polder system to handle flood disaster in Port of Tanjung Emas Port Semarang both from operational aspect and its maintenance and also evaluate polder system performance as flood / rob disaster management system. This study is a case study, which is to investigate in depth about flood / rob handling system using polder system. The approach method used in this research is descriptive method. Respondents of this research are the parties in the port area that is the manager (PT Pelindo III), port and port hydrological experts both the workers and the harbor. Data collection was done by field observation, questionnaires and interview. Data were analyzed by descriptive analysis. Keywords: flood / rob handling, polder system, port ofTanjung Emas
The Flexural Behavior of the Full Height Rectangular Opening Castellated Steel Beam with Diagonal Stiffener
The full height rectangular opening of castellated steel beam is failed in Vierendeel mechanism. The Vierendeel failure mechanism made the load capacity of castellated steel beam is lower than its original section. In this research, the 16 mm diameter of steel bar as the diagonal stiffener is used as a reinforcement on the full height rectangular opening of castellated steel beam has a purposes to prevent Vierendeel failure mechanism so the load capacity of castellated steel beam can reach its maximum capacity. This research used a specimen of 3059 mm long span of castellated steel beam to study the flexural behavior. The specimen will be given the static load until it reached its maximum capacity. The test result show that the load capacity of the castellated steel beam is increase 157% compare to its original section. From the theoretical calculation it has 6.15% difference from the laboratory test result. Keywords: castellated, Vierendeel, flexural behavior
Feasibility Study Development Of Randugunting Dam By Taking Larap Factor (Land Aquisition and Resettlement Action Plan)
Water is an essential ingredient for food availability, health and survival. Dams is one form of building in an effort to conserve water resources. The Randugunting Dam Development Plan in Blora Regency enters into 65 priority Dam in NAWACITA. Then to determine a project is feasible to be implemented or not, feasibility studies should be undertaken so that the business or project that is run not be in vain in the future. Any proposed public or private program or activity that is beneficial to the public interest and will result in an impact on 200 or more persons and requires compensation, it should be supplemented with a Land Acquisition and Resttlement Action Plan (LARAP) the policy covers: 1) Land acquisition and / resettlement should be avoided or minimized as far as possible; 2) If procurement of land is inevitable, the compensation provided and the transfer of the PAP should be accompanied by coaching efforts; 3) WTD receives appropriate compensation based on calculated replacement cost of affected assets; 4) In determining the amount of compensation value should be based on consultation and discussion with WTD. The cost components of the Randugunting Dam Development include pre-construction costs (land planning and acquisition / LARAP), construction costs and maintenance operation costs. Benefit components are viewed from the parties concerned with the project, especially for people in need including agriculture, fisheries, raw water, flood control, electricity and tourism. Development cost of Randugunting Dam with investment of Rp. 861.714.687.361 for 50 years. In view of the calculation results, NPV can be concluded of 139.866.838.506> 0 then the NPV is acceptable. The rate of return with the interest rate of 11.63% then the value of IRR of 11.63%> of DF = 10.49% so that investment is feasible. With the age of 50 years reservoir with the value of BCR of 1.16> 1 then the dam construction is feasible. BEP (Break Even Point) of the analysis produces BEP in the 30.4 year. Keywords: Feasibility Study, LARAP, Dams
Strategy of Natural Disaster Management of Rob In Tanjung Emas Port Area Based on Value Engineering Analysis and Stakeholder Expectations
Tanjung Emas Port was inaugurated by the government in 1985 and became the main entrance of export and import goods to and from Semarang. So many big companies are building their factories in this area. There is even an industrial estate called Tanjung Emas Processing Zone (TEPZ) which some companies enter in bonded zone. Yet this port faces an ever-present problem, namely rob coming from tidal water and also a continuous decline in soil surface. In order to protect the various port facilities, it is necessary to create a robust flood handling system that is economical, efficient and accurate. The aim of this research is to get the result of handling of inundation based on value engineering analysis and the best stakeholder expectation. Value engineering research approach is directed to the analysis of a function that is a way to get or know the functions that are not needed. The function is presented in the comparison of Cost and Worth. VE analysis in this study was conducted by comparing the handling of rob disasters between polder systems with road elevation. Analytical techniques used include information stage, functional analysis phase, creative phase, evaluation phase, development stage and presentation stage. Keywords: rob handling, value engineering, stakeholder expectations, Tanjung Emas port
Integrated Implementation Conservation In DAS Serang (Study Case Institutional Group Of Land And Water Conservation Sampetan Village Subdistrict Ampel, District Boyolali)
Serang Watershed is a region dominated by steep slopes and high rainfall. This causes the region to have a high erosion potential. Water resources conservation activities in the upper watershed of Serang Watershed have been started with the construction of a number of conservation infrastructure. However, until now these efforts have not been assessed properly. This is because the existing institutional system is not functioning properly. This research discusses the strategy of conserving water resources activities in the study sites by Soil and Water Conservation Groups so that it is expected to overcome erosion problems at the research sites so as to improve the welfare of the community in the Serang watershed, especially Sampetan Village. Research method using questioner, interview, field survey, literature study, and SWOT analysis. Based from the analysis it can be concluded that by using the slovin formula, the number of respondents used as sample is 96 people from the population of 127 people consisting of various stakeholders including Village Government, Local Government, KKTA, and Community Leaders. Using SWOT method is analyzed external and internal factors of forestry and institutional resources of Sampetan Land and Water Conservation Group. Keywords : Erotion, Conservation, Institutional, SWOT.
Analysis of Project Delays on the Work of Abrasion Handling of Panjang Island of Jepara
Ideally, in the construction project, all components of the contract are clearly described to the contractor regarding the agreement, technical specifications, plan drawings, general and special terms, quantity list, implementation plan and schedule to limit the project completion time. However, the cases experienced in the construction are a discrepancy between the plan and the implementation schedule that has been made with the realization in the field, resulting in delays in project completion. The purpose of this study (1) Analyzing the variable factors of labor, work tools, materials, finance, managerial, planning and scheduling of project delays on the work of Panjang Island abrasion handling. (2) Analyze the most dominant variable about project delay of Panjang Island abrasion project. This research method is descriptive quantitative. The research location is in DPUPR of Jepara regency with total sample is 40 respondents. The data analysis is multiple linear regression using SPSS V.21. The results showed that (1) labor, working tools, material, finance, managerial, planning and scheduling variables contributed to the delay in Panjang Island abrasion project. This can be seen from the value of F arithmetic of 136.288 while for the value of F table is 2.34. In addition, the significance value is 0.000. (2) The most dominant variables on the delay of Panjang Island abrasion project are financial, planning and scheduling. Â Keywords: Construction Project, Employment, Project Delay
Stabilization of the Shear Strength of Clay Soil with Limestone Powder
Soil is base and the most widely material used for civil engineering and structural engineering construction. However, not all kind of soils can be used for the construction. For a soil having low a shear strength such as a soft soil, it needs to stabilize. Stabilization methods that commonly used are by compaction or chemical stabilization. With the objective to study the shear strength of clay soil, this research performed an experimental study by adding variation of limestone powder to clay soil. The clay sample is from Nganjuk city, East Java that is classified as a montmorillonite clay with Gs number is 2,698; liquid limit 62,6 %; plasticity index 19,07% , and the qu number is 1 Kg/cm2. The percentages of the limestone powder were in 5%,10%,15%,and 20%. The pure clay and modified clay were tested using Unconfined Compression Test (UCT). The result showed that with the addition of 20% limestone powder may decrease the Gs number to be 2,351; liquid limit 54,2%; and plasticity index 7,81 %; however the qu number increased with the addition 5-15% limestone powder but it decreased with 20%. Keywords: clay soil, soil stabilization, limestone, shear strength, unconfined compression test
Dealing With Issues in Construction in the Coastal Area of Soft Clay: Solution, Strategy & Implementation
In this condition, cities with coastal area have soft clay soil. The main problem is that the soft clay soil has bee n suffering from great settlement due to consolidation that makes the buildings around become instable, it causes the landfill is done on the soft soil. Suppose the consolidation happens naturally as it is, it will run in a relatively longer time, years or even decades. In order to be stable, it needs longer time, as consequence, the soil is not able to be used for building to which it will give damage in term of time and finance. It is why engineering is needed to fasten the consolidation process in order to make the soft clays soil able to be used efficiently. One of particular methods to fasten the consolidation process is building vertical drain. There are many ways and materials that can be used to set up vertical drain, among which are making small holes through drilling then filling it up with porous materials such as sand and gravel stone or coir. Nowadays, new method has already been available to fasten the consolidation process by geosynthetic. It is Prevabicated Vertical Drain made of polymer material. The use of geosynthetic for vertical drain can fasten the consolidation process significantly. The speed process of consolidation depends on the types of soil and model of the vertical drain as well as the distance among holes. Vertical drain can only accelerate the settlement due to consolidation, but it does not minimize it. By applying the drain model, time for the soil settlement can possibly be arranged that makes the soil of reclamation more ready for use. Keywords: consolidation, vertical drain, goesynthetic
Analysis on Soil Liquefaction Potential in Pangandaran Coastal Area West Java
Pangandaran, West Java is well known as an earthquake prone area. The impact of an earthquake in a coastal area which contains saturated sand soil is liquefaction potential. This phenomenon occurs when earthquake hits, the water pore pressure increases and the effective stress becomes nil then the soil loss its shear strength. With the objective to study the liquefaction potential in Pangandaran coastal area, this analysis was conducted. Two kinds of analysis were performed by manually calculation method and using Quake Geostudio program. Seed’s method based on safety factor as a key control to determine the liquefaction potential was used. This method requires N-SPT data. The result of the analysis showed that based on Seed method with a value acceleration of earthquake is 0,5g, FS value is 1,55. This value means that Pangandaran coastal area is not susceptible to liquefaction. From the analysis using Quake, as ground acceleration increases, pore water pressure also increases. It means the higher of ground acceleration can have liquefaction potential. Keyword : Liquefaction, Seed method, ground acceleration, Pangandaran
An Analysis Of Stability Slope By The Use Of Bamboo As An Alternative Bracing (A Case Study: Road Area Grogol Semarang City )
Landslides often occurs because caused by rain , earthquake , and the load that stands in an area of the slope . .then of it badly needed handling landslide effective and efficient , to danger due to landslide could be on tap . During this in handling landslide do with using a retaining wall of land, the plaster , and the installation of geotextile. In this research by the use of bamboo terucuk as bracing of slopes on urban Village Road Grogol Pudak Payung Semarang City it is hoped can increase the stability of a slope , the reeds are in use is bamboo a rope with a diameter of 15 cm and bamboo betung with a diameter of 25 cm. Analysis on the plaxis v.8.2 and geoslope. The results of the study showed that, 1) of a series of land test showed c = 37.265 kn/m2, ïª = 13º, γsat = 18.854 kn/m3, γunsat = 14.866 kn/m3. 2) bamboo data : ea bamboo petung = 7.31x105 kn/m, ei bamboo petung = 850.25 kn.m2, ea bamboo tali = 6.3x104, ei bamboo tali = 145.6 kn.m2. 3) the condition slope in the way of grogol unstable which the figures security the state of experience is sf = 1.4866, and after in give burden sf = 1.4856, after in give bracing of with the bamboo and analysis from safety factor is showed factors sf = 1,8339 where the was assumed safer if safety factor (sf) >1.5. Keywords: stability slope , bamboo petung , bamboo rope , security factor .
Evaluation Of Performance Implementation Of Sanitation-Based Community Sanitation Program (SLBM) In Pemalang Regency
Sanitation and waste water become an important issue, as population growth. It is estimated that in the next 2025, almost 68.3% of Indonesians inhabit urban areas. Population access to the basic infrastructure of settlements is influenced by aspects of health, environment, socio-cultural education and poverty. Community-Based Environmental Sanitation (SLBM) is one of the sub areas of DAK in the Infrastructure Sector, sourced from the State Budget (APBN) provided to finance sanitation and wastewater activities in regional affairs and become a national priority. Through this research to get: 1) evaluation of program policy toward implementation performance of SLBM, 2) factors influencing performance of SLBM program implementation, 3) dominant factor influencing to SLBM implementation. The research used qualitative quantitative method of quantitative with multiple linear regression analysis. Regression model formed Y = 0.966 + 0.093 X1 + 0.207 X2 + 0.190 X3 + 0.191 X4 + 0.097 X5, where the value of F arithmetic is 36.159 with a significance level of 0.000. The significance level obtained is 0.000 <0.05 so that the regression model is considered feasible to predict the dependent variable (Y) based on the independent variables. Of the five variables tested, community assistance with the coefficient of determination is 32.9% is the dominant variable that affects the success of program implementation performance. The aspect of participation is so important to support the success rate in the development and development of sanitation, therefore the cooperation of all parties between the government and the Sanitation Working Group, the community and all parties is expected to be sustainable. Keywords: Sanitation, SLBM, Community Assistance, Parsitipation.
A preliminary study: An agent-based spatial simulation of human-coastal environment interaction in coastal urban tropical area
Reported, 65% of Java island population are living in coastal area where one of the most affected areas on climate change. Disaster related to hydrological cycles such as flooding caused by tidal is the most frequent happen in the low area zone as well as Semarang city in Central Java province. Many process impacted tidal flood: land subsidence, sea level rise, and coastal land use change as a consequences of population pressure. It will getting worse when heavy rainfall is occur. Predicted, 2672, 2 Ha of coastal area at Semarang city will inundate caused by 16 cm sea level rise due to global warming impact. By this fact, coastal community is the most vulnerable group due to the flood. This paper is a preliminary study to simulate the interaction of humancoastal environment to response, adapt and mitigate the tidal flood through agent-based modelling (ABM) within spatial concept. ABM frameworks have been portrayed to function well in a socioenvironment context, modelling efforts for coupled human-coastal environment system that described as a process-based design framework. In this research, human actions are interpreted as an aggregate social response to stimuli from the physical system with both aspects being explicitly modelled at the scale of emergence of the hydrological phenomenon in coastal areas. The natural (coastal-hydrology) system is set, in modelling terms, through physical (tidal, land subsidence, land use change) models; the response of human units (settlements, fisherman, industry communities etc.) is then studied as a reactive mechanism to physical model output, such as tidal flood. In the other word, ABM is an empirical methods for building agent decision models in spatial planning. Keywords: agent-based model, coastal environment, human interaction, spatial planning.
Study on the Feasibility of Construction of Logung Dam in Kudus Regency
The availability of water in the increasingly rare dry season and the tendency of floods in the rainy season, is a problem that can not be solved completely in various regions in Indonesia. The construction of reservoirs is generally aimed at helping to overcome the problem of increasing water resources needs from time to time. The area of Kudus Regency is an area with relatively limited water resources. Therefore it is necessary to plan the construction of Logung dam in the hope that the surrounding ground water can be maintained, the forest can be grown, and in the end can preserve the existing water source. The aim of this research is to get an overview of Logung Dam plans that are economically feasible both from cost aspect and benefit aspect. To find out the feasibility of Construction of Logung Dam in Kudus Regency, Net Present Value (NPV), Internal Rate of Return (IRR) and Net Benefit Cost Ratio (Net B / C) will be performed. Keywords: economic feasibility, Logung dam, Kudus regency
Global warming causes climate change and sea level rise. This is a threat for coastal regions, especially for coastal settlements with activities that are influenced by this natural phenomenon. Consequences are damage of houses, humid house environment, sustainability of the houses, obstructed economic activities and domestic works, disruption of sanitation facilities, lack of electricity, failure of transport system, psychological issues and other. Icons Tambak Lorok as " Fisherman Village " is not something familiar to residents of the city of Semarang . Especially for the housewife who every day have to buy the ingredients high in protein and omega fish auction which is adjacent to the main street market in the village of Tambak Lorok. However, there are major problems that are being experienced by this small neighborhood. In fact, this issue includes seven infrastructure that should spoil the fishermen in activity with marine life. With this research we will investigate water urbanism and climate change resiliency in Semarang, specifically the traditional fisher community of Tambak Lorok. We intend to find out how the local people in the fisher settlement Tambak Lorok deal with water urbanism, proper and living with floods. So, we have a good solution for this problem, Floating Stage. We think that Tambak Lorok need a new design for the common future. With this, One Building at A Time for Tambak Lorok, will be a good solution. Keywords: Fisher community, Environment, Climate Change, Settlement.
Correlation of Cultural Activity of River Bank to Tidal River Transportation Function
Mentaya River is a tidal river that is closely related to the coastal and sea. History shows a close relationship between settlements and rivers, in areas of Borneo that have very close relationships between rivers in the formation and development of people and communities. From the development of the people who live on the banks of the river, they can make the river as one of the sources of their life and income sources, both from the aspects of transportation, economic, social and cultural. No one if settlements on the river bank is one characteristic of Sampit City. However, with the progress of the times, there was a decrease in some river culture activities followed by the decline of the Mentaya River function. Based on the settlement condition of Mentaya River, the researcher used the questionnaire sample based on the beginning of the community from 1970-2015 to deeper the knowledge and implementation of the society on river culture and its effect on river transportation function. The research was carried out by Quantitative Rationalistic research method, through correlation analysis technique approach, the result of positive influence and change activity response with different relationship level and influence from some river culture activity to preservation of function of Mentaya Sampit River. Keywords: Tidal River Culture, river bank settlements and River Transportation Function
Public Infrastructure Problem For Developing Tourism Destinations In Coastal And Small Islands Areas Case Study In Karimunjawa Archipelago
Karimunjawa is one of the archipelago in the north of Java island. It has uniqueness of nature. In these archipelago, five forms of ecosystems can be found. One of the exciting ecosystems and the main attraction of tourists who come to Karimunjawa is Coral Reef. The number of tourists who visit to Karimunjawa is increase along with the ease of transportation and the many choices of modes to Karimun although in the west monson This condition would bring both positive and negative impacts. The increase number of tourists who visit to Karimunjawa has not been followed by the readiness to provide adequate infrastructure.It is causing the emergence of various problems in Karimunjawa. The aims of this study is to reveal the problems of public infrastructure in developing tourist destinations in coastal areas and small islands. This research uses rationalistic deductive method, with empirical description analysis technique. The findings obtained from this research are the emergence of environmental issues such as water supply, electricity and telecommunication and waste management problems. Keywords: public infrastructure, tourism , Karimunjawa
Inventory Of Environmental Issues Related To The Utilization Of Natural Resources In Coastal Areas Case Study : Wedung Sub-districts, Demak Regency
Wedung Sub-districts, is one of the locations in the southwestern coastal estuary of Demak Regency. Potential natural resources, mainly salt encryption pond, agriculture, characters livestock. The harmful socio-economic life of the community is dominated the United States farmers' and market traders. many environmental problems faced by the local community. The purpose of this research is to conduct an inventory of environmental issues related to the utilization of natural resources. The methodology employed is a qualitative deductive rationalist approach, with descriptive analysis techniques. Research variables include natural resource types and environmental issues. the conclusion of the research is the natural resources of the coastal area of Wedung Sub-districts covering marine resources producing fishfinder catch and people's salt encryption . Agriculture with the main production of rice. Environmental issues encountered include abrasion, flooding, rob, beach abrasion, drought. Keywords: environmental issues, coastal areas.
Variables Study Cause Of Delivery Of The Boyolali Road Improvement - Jrakah / Selo On 2015
Various physical infrastructure activities carried out to improve road performance one of them with improvement and improvement of roads. Package of road improvement activities Boyolali - Jrakah / Selo is worth 19.5 billion more with the type of handling of concrete road pavement + concrete widening + 2 layer overlay over 4 km. However, the timing of the activities specified during the 240 working days is delayed due to various factors. Though this road has a function and a very important role that disrupt the activities of society and the flow of agricultural goods. The purpose of this study is to determine the factors causing the delay of the project Improving the Road of Boyolali - Jrakah / Selo in 2015. The research method used is descriptive approach method. The survey method was conducted to capture the opinions, experiences and attitudes of the respondents on the issues in road improvement project of Boyolali-Jrakah / Selo road in Boyolali Regency through questionnaire and institutional survey. The sample of research using all members of the population is called total sample or census which amounts to 60 respondents. The analysis technique used is factor analysis. While the variables used are labor, materials, equipment, design, planning and implementation, financing, social environment and community and managerial. Keywords: project delays, road improvements, Boyolali-Jrakah road
Declining Analysis of Service Function Area Irrigation Sragi Pekalongan Regency
Irrigation Area Sragi is one of irrigation areas of central government authority with a standard acreage of 3426 ha and functional area of 3212 ha located in Pekalongan Regency. The availability of water and the water supply from the weir is sufficient but the downstream supply can not be met. The purpose of this research is to get index of irrigation network performance of Sragi Irrigation Area and priority scale of handling to decrease function of irrigation network service of Irrigation Area of Sragi. Descriptive approach method to collect information about the conditions that are happening on the Irrigation Network Dareah Irrigation Sragi Pekalongan Regency. The results are the variables of irrigation buildings, the implementation of water distribution of buildings in tapping buildings, anticipation of water loss, sedimentation in irrigation networks, human resources and water management affect the decline in service function D.I Sragi. The most influential variable to the decline of irrigation area service function is irrigation building variable which is shown by regression coefficient value equal to 0,106. Keywords: service function, irrigation area, Sragi
Assessment of Geotechnical Feasibility in Development of STIE BPD Semarang
Geotechnical studies are an early stage for planning an infrastructure. In general, the geotechnical parameter value of a region is determined by soil characteristics. To know the condition of the soil layer under the structure, it is necessary geotechnical investigation. Toptografi uneven shape and the value of the low bearing capacity causes the need for planning the reinforcement. The reinforcement used is soil nailing and retaining wall. In this feasibility test used analysis of soil bearing capacity with plaxis program. The results of the analysis show that the reinforcement at the construction site of STIE BPD raises the value of its Savety Factor reaching 5.83. Â Keywords: Geotechnical investigation, soils bearing capacity, reinforcement.
Sensitivity Test of Betts-Miller-Janjic and Grell-3D Cumulus Schemes on WRF-ARW Model to Simulate the Heavy Rainfall Event in Lampung (Case Study: 20 February 2017)
Lampung is a southernmost province on the island of Sumatra, Indonesia. The occurrence of heavy rain on 20 February 2017 caused flooding in some areas in Lampung. The heavy rain that lasts long enough, from 11:40 UTC to 23:00 UTC, is due to a group of convective clouds that form the Mesoscale Convective Complex (MCC) which observed on Himawari-8 satellite images. Data used in this research are FNL (Final Analysis) data from http://rda.ucar.edu/, Himawari-8 data from BMKG, and GSMaP rainfall data from ftp://hokusai.eorc.jaxa.jp. The aim of this study is to test the sensitivity of two cumulus parameterization schemes of WRF, they are Betts-Miller-Janjic and Grell-3D. Testing is done by using spatial verification and statistical verification. Overall, the output of both schemes shows that the Grell-3D scheme is good enough to describe the occurrence of the heavy rain event. Based on the results of the analysis of both schemes, it is shown that the atmospheric conditions over Lampung are very wet which is indicated by the height of the air moistness in each layer and supported by the convergence area and also the height of CAPE value which supported the formation of convective clouds during this heavy rain event. Â Â Keywords: cumulus schemes, WRF-ARW, heavy rain
The Effectiveness Of Water-Filled Rubber Weir Management On Flood Mitigation Caused By Rain And “Robâ€ (Java Slang) In Demak District
In Indonesia, there are many sources of water. They can be ground water, rivers or seas which are certainly not easy to process these resources. Many problems have to be solved in processing these resources, such as flooding and "rob" problems in the Demak district. When dry season comes, how can we provide raw water and pure water for irrigation and other problems? One of the right solutions is to make a rubber weir that contains water. Normally, weir contains wind but this study tries to use different methods of filling weir by using water to make it easier and more practical in the treatment. Identifying problems such as alternative flood and rob handling is intended to unravel the problems in traffic congestion, submerged settlements and industrial estates, and analyzes the stability of the flow that occurs in the water-filled rubber weir model. The formulation of the problem with the model of water-filled rubber weir must be followed by the experimental system conducted in the Lab Faculty of Engineering UNISSULA Semarang. Therefore, the main problems studied in this research are the experiment of the waterfilled rubber weir, the hydraulic effectiveness of the water-filled rubber weir, and stability analysis of numerical models of the water-filled rubber weir. The purposes of this study are analyzing the hydraulic effectiveness of water-filled rubber weir with SOBEK application, analyzing the characteristics of the water-filled rubber weir to obtain a good weir material based on appropriate technology, and conducting a stability analysis of the flow occurring in the water-filled rubber weir model, prototype simulation of water-filled rubber weir. Keywords: Management effectiveness, Water-filled rubber weir, Flood and rob prevention
The Effect Of Contractor Management On The Quality Of Construction Work In District Of Demak
Several factors influence the performance of the contractor's management on the quality performance of the resultant work. Through management studies on this contractor is intended to provide an overview of what effect is correlated with the quality achievement of construction work in Demak district. The data collection is done by survey method of existing contractor company of middle-qualified (CV) in Demak district. The results of this study indicate that contractor management contributes 82% to the quality performance of construction work in demak district. While some components of contractor management that affect the quality achievement is Planning Variable regression coefficient (X1) of 0, 152 , Organizing Variable regression coefficient (X2) of 0.373, Staffing variable regression coefficient (X3) equal to 0,559, Directing variable regression coefficient (X4) amounted to 0.236, Controlling variable regression coefficient (X5) amounted to 0.133 Keywords: Management, Contractors, Quality Work
FEASIBILITY REVIEW OF INVESTMENT DEVELOPMENT OF PARKING BUILDING ( Case Study At Telogorejo Hospital Semarang)
Telogorejo Hospital Semarang is one of the centers of activities in the field of health services in the city of Semarang. The increasing number of patients, visitors, doctors, and employees using private vehicles resulted in increased volume of incoming vehicles, making it difficult to get adequate parking space. Lack of parking space causing inhibition of traffic flow, so require parking facility in the form of parking building. This study aims to analyze the characteristics of parking, parking space requirements and analyze the feasibility of investment in the construction of parking lots, especially in Telogorejo Hospital Semarang. so it can get the conclusion that the feasibility of investment in building parking Parking Hospital Telogorejo Semarang either this can be seen from the results of Telogorejo Hospital Analysis Semarang using BCR method to get the value of 1.41. Value 1.41> 1 which means the project is feasible to be implemented, because it has a high benefit value. And using the NPV method generated profit obtained is Rp. 41,622,088,410 The value of profits obtained is not so great but there is no minus (loss). Using the IRR method generated 15.58% which is above the provisions of BAPPENAS that is equal to 15.58%. Keywords: Feasibility, Investment of Parking Building Construction
The Value Engineering Analisys Of Drainage Job (Study Case at Cluster Naraya Project of Bukit Semarang Baru)
Value engineering is a decision-making process based systematic and structured multi disclipinary. Drainage is a disposal water mass media in natural or artificial from the surface or subsurface of a place. In the housing scope, drainage is enabled to accomodate the flow of used water and rain water from the house which then flowed into the downstream or river as the final disposal place. The purpose of this study is to assess the initial design of the stream viewed from the cost budget plan. Find out whether the alternative design are required, find out the ideal alternative design, and get a comparison between the initial design and the alternative design. The result of this research is the analysis of budget plan, the production cost of initial design with u-ditch and buis concrete material is inefficient with budget of cost Rp. 1.781.350.200,- and then made alternative design buis concrete precast with budget of cost Rp. 1.104.667.700,- . After comparison between initial design and some alternative design, it is known that alternative design that can be recomended to be done is the alternative design with buis concrete precast material because it has lower price, by the difference of profit Rp. 676.672.500,-. Keywords : Value Engineering, Drainage
Feasibility Study And Investment Analysis Of Mix Use Sentraland Semarang
The construction of high-rise buildings is being done in urban areas, especially vertical buildings due to the low availability of land. The longer development of the building leads to more complex functions resulting from the fulfillment of needs for the surrounding community so that the development of the building that can accommodate all the needs of the community is the mix use building. Building with this combined function certainly has a more complex influence both in terms of economic and environmental. Required detailed economic calculations in order to obtain maximum results from the building, especially for investors who have invested for the construction of the building, for that needed a feasibility study and investment analysis. So before the project is carried out can be taken whether the project is feasible to do or not according to the results obtained calculations. The results of this study show that the feasibility study and investment analysis of mix use building that has been done can give a clear picture about the profit or loss of the project implementation for the owner who will invest or the building manager later. Keyword: Feasibility study, Investment analysis, Mix use building, Economic engineering
The Potential Liquefaction in Yogyakarta and Bantul
The phenomenon of liquefaction occured in Yogyakarta at the massive earthquake on May 27th, 2006. This phenomenon may be occur again because of the geological and seismic conditions in Yogyakarta that support the occurrence of liquefaction. This research aims to determine the level of liquefaction potential in Yogyakarta especially the central of Yogyakarta and Bantul. Analysis of Liquefaction potential use Youd method. The results of soil investigation shows that the type of soil in the research area is uniformly graded sand. The depth of the ground water level in October 2015 in the research area around 0,8-13,4 meters. The Attenuation function of Crouse-Mc Guire produce PGA largest value-which is about 0,23g-0,56g. The potential liquefaction in Yogyakarta is about 0 – 2,06 (very low) and Bantul is about 0 – 48. Watu is the highest potential liquefaction in Bantul. Keywords: earthquake, liquefaction, LPI
Optimization Of Implementation Of System Irrigation For Improving Agricultural Results In Cepu-Blora
The productivity of agricultural products in Cepu decreases in 2015 -2016 per hectare by an average of 5 tons with the management cost per hectare of 8.6 million rupiah, especially irrigation, which applies electric and diesel pumps during one season, the cost of fuel oil and electric pulse is 4.6 millions of rupiah, the condition is caused by the pattern of irrigation network application has a resistor related to the availability of water and technical management of both wet and dry land has not been optimal, based on the problem the irrigation network model needs optimal assessment, to fulfill the increasing need of irrigation water, one alternative is done the application of an efficient model of irrigation networks with the consideration of knowing the water requirements of both wet and dry crops calculates the existing water discharge as a system of applying the appropriate and efficient pattern of water distribution of irrigation. To fulfill the water needs of the ground and the river water use plants for irrigation is greatly enhanced witches by farmers, by providing the resources (human, equipment, materials) available, optimal modeling of the irrigation system is required. The main objectives of the study to be achieved are 1). Knowing the applied irrigation system, 2). Knowing the crops of agriculture in the last two years. 3). Knowing the availability of water. As a reference to optimization and broader development of irrigation networks in accordance with the availability of water in each farmer's rice fields. The method of the study is quantitative descriptive method that is designed to collect data, by surveying the field to find out the existing irrigation network model, water discharge, crop water requirement, harvested yield. Sampling was conducted by quota sampling all rural of each 3 (three) farmers in 17 (seventeen) villages total sample 51 people who were considered able to represent the farmers. The survey result showed that 17 (seventeen) villages in Cepu there are nine villages which implements irrigation technical and semi technical means such as Ngadon, Jipang, Kapuan, Ngeloram, Nglanjuk, Sumber Pitu, Getas, Kentong and Mernung average debit is 0,020 M3 / second farmer area average 0,50 ha. The results showed that 9 (nine) villages implemented technical irrigation by utilizing underground water as irrigation network in each plot of farmer land there was one village applying an irrigation network of open tapping channel from the river. The results showed that there were 8 (eight) villages with rain-fed irrigation system. Farmers harvested in Cepu from 17 villages on average of 2.35 tons in 2015 and 2.33 in 2016 average land area of 0.5 ha. Types of irrigation networks covered by 0.42 m3 / min average water discharge able to win the average land of 0.5 ha for 40 hours (two days) of water flowing into rice fields, planting pattern with SRI method applying 2/10 to achieve optimal and efficient results water usage Keywords: Irrigation System, Rice Field, Agricultural Product
The Effect Of Middleman Behavior to Economic Space on TPI Tawang, Gempolsewu Village Rowosari District Kendal Regency
Fish Auction Place is an economic space that has great influence for fishermen in marketing their catch so that fishermen can sell their catch as short as possible with good price and can create healthy market through pure auction. Based on Local Regulation of Kendal Regency Number 10 of 2010 concerning management and retribution of fish auction place in Kendal Regency, mention that to guarantee the balance of management of fish auction place in order to improve prosperity and standard of living of fisherman /coastal communities in Kendal District. However, in TPI Tawang area there is a problem that is middleman activity. The activity is very influential on the economic space TPI Tawang. Based on the above problems, the researcher wants to know the influence of behavior middleman to economic space TPI Tawang Gempolsewu Village. To achieve these objectives, several analyzes were conducted, among others, activities of middleman, economic space in TPI Tawang area and analysis of influence of middleman activity on economic space of TPI Tawang community of Gempolsewu Village. In this research using qualitative descriptive approach rationalistic with middleman activity variable and economic space in TPI Tawang area. Stages done in doing this writing is through several stages, among others, preparation, primary or secondary data collection, processing and presentation of data, data analysis, and stage preparation of reports. The conclusion of this research is middleman activity which is in TPI area of Tawang precisely at TPI Tawang dock influence activity in economy room that exist in area of TPI Tawang. The influence of middleman activity in Tawang TPI area can be seen from the activity system which can cause the decrease of activity and the decrease of economic space activity in Tawang TPI area. Keywords: Fish Auction Place, Middleman, Activity, Economy, Coastal, Space
The Model Of Passenger Prediction Of Ahmad Yani Airport Semarang, Route Semarang – Jakarta
Air transportation demand for the passengers showed an increasing number for about ±11,5% from 1993 until 1997. Within assumption the number of passengers in 2020 is known, so that the dominant parameter and to fulfill those means, can be calculated. The Model of Air Transportation Demand for the passengers in Ahmad Yani Airport is analyzed by regression analysis, based on route of the plains, and we choose the dominant route, which is Semarang-Jakarta. Service authority is restricted by the impact of space and time by nearest authority, which are in Solo by Adi Sumarmo Airport, in Yogyakarta by Adisucipto Airport and Cilacap by Tunggul Wulung Airport. Based on services area and the data of social-economic condition for service area, a model of passenger demand is created for those two main routes within amount for two main route either departure or arrival as dependet variable (Y) and data of sosio-economic condition from 19881997 as independent variable. From the model, PDRB variable (X2) is very dominant on equation for route of Semarang-Jakarta Because of monetary crisis from the middle of 1997 until now, the model from data in 1988-1997 is only use basic to get equation with the data from 1998-1999 mend to have the valid result appropriately. By using equations, the quantity of passengers in Ahmad Yani Airport can be predicted, the result total route in 2020 on quantity is still below than in 1997, so that all the infrastructure unnecessarily added. Keyword: passengers, air transportaion, route
The Characteristic of Sandy Soil’s Shear Strength with Lime and Coal Fly Ash Mixture
Sandy soil in solid conditions tends to have good characteristics. However, sand in the even and loose and water-saturated conditions has low shear strength when cyclic load occurs (such as earthquake). This paper presents the results of research on the improvement of sandy soil with a mixture of lime and coal fly ash. Two mixing techniques on the sandy soil were done in column (method A) and mixed (method B). Coal fly ash - lime mixture was done with a ratio of 1: 1 (in weight ratio). An unconsolidated undrained triaxial test was performed for both methods at the test of 1 day, 3 days, 7 days and 14 days. The size of the triaxial test specimen was diameter = 36 mm and height = 72 mm. For method A, the column was made as high as the test specimen with a diameter size of 12 mm. The shear strength value of unstable sand was 35.4 kPa. Overall, it can be concluded that stabilization techniques affect the shear strength of sandy soil. The soil improvement technique with method B gives a larger shear strength value than method A does. However, sand soil behavior with improved technique of method B is more brittle than method A. Keywords: strong shear, sand, coal, lime, triaxial
Bus Rapid Transit (BRT) Operations To Reduce Traffic Congestion On Kaligawe Road In Semarang
Traffic congestion in the city of Semarang is increasing. This is due to the unbalance between the development of road infrastructure and the increasing number of vehicles. Therefore, an orderly, smooth, safe, and convenient mass transportation is needed to reduce congestion. The purpose of this research is to analyze the performance of Bus Rapid Transit (BRT) operation in Semarang City through Kaligawe road. This route is expected to become a reliable public transport in breaking down congestion. The research methodology begins with conducting a Kaligawe road performance survey which is about 4 KM in length, including traffic volume of Semarang-Demak direction of 3.982 emp and the reverse direction of Demak-Semarang is 3.814 emp. While degree of saturation ranged from 0.59 to 0.83. The results of the analysis on BRT found an unbalanced comparison between the capacity of BRT and the volume of traffic passing through the road. The results of this analysis and survey is necessary to maximize the function and work of BRT in several ways ie the location around the shelter must be barrier-free so that BRT can stop at the shelter. there should be a shelter guard who serves as a janitor, security, and information provider about the schedule and about the BRT. The socialization needs to be improved to the public, preferably the holding of Smart Card and feeder transportation, and the holding of tariff reduction in order to increase public interest. Keywords: Performance Analysis, BRT, Kaligawe Road