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Journal of the Civil Engineering Forum

jcef
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Published by Universitas Gadjah Mada

ISSN : 25811037 EISSN : 25495925 DOI : -

Core Subject : Social, Engineering,

Civil Engineering, Building, Construction & Architecture Environmental Science

Journal of the Civil Engineering Forum (JCEF) is a four-monthly journal on Civil Engineering and Environmental related sciences. The journal was established in 1992 as Forum Teknik Sipil, a six-monthly journal published in Bahasa Indonesia, where the first publication was issued as Volume I/1 - January 1992 under the name of Forum Teknik Sipil.

Arjuna Subject : -

Articles 225 Documents

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EVACUATION ROUTE MAPPING AGAINST SLAMET VOLCANO DISASTER AT GUNUNGSARI VILLAGE, PULOSARI SUB DISTRICT, PEMALANG DISTRICT Misdiyanto Misdiyanto; Djoko Legono; Subagyo Pramumijoyo
Journal of the Civil Engineering Forum VOLUME: XXIII/1 - JANUARY 2014
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Villages inside the hazard zone of Slamet Volcano should have an evacuation map, as an anticipation and guidance to guide people evacuate when volcanic activity on the area arise to dangerous level. The experience which occurred at 2009 and 2010 indicate the necessity of the development of evacuation map for 7 villages inside the hazard zone in the Pemalang residential district, such as village of Gunung Sari. The main purpose of the developing an evacuation map is to make the village of Gunung sari becoming more vigilant to anticipate the danger of Slamet Mount eruption. Qualitative methods were used in this study, by handing out preliminary questionnaire to investigate the characteristic of the residents. The development of evacuation map also relies on the participation of the residents, then the resulted map were evaluated by assessing how far people can understand and comprehend any information provided on the map. The result of the investigation shows that Gunungsari’s resident wants an evacuation map, shown by high enthusiasm on the questions of the necessity of an evacuation map and disaster preparedness team that is equal to 97% of the residents on Dusun Sipendil, 83% on dusun Sibedil, 67% on Dusun Silegok, and 63% on Dusun Krajan. The residents also understand and comprehend the information provided on the map nicely, especially about the timing and rendezvous location for the evacuation. It is indicated by high proportion of residents that answer the questions asked accurately, which is 100% on Dusun Sipendil, 97% on Dusun Sibedil, and 80% for both Dusun Silegok and Dusun Krajan.Keywords: disaster prone area, evacuation map, society characteristic

TIME SERIES CHARACTERISTIC ANALYSIS OF RAINFALL, LAND USE AND FLOOD DISCHARGE BASED ON ARIMA BOX-JENKINS MODEL Abror Abror
Journal of the Civil Engineering Forum VOLUME: XXIII/1 - JANUARY 2014
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Indonesia located in tropic area consists of wet season and dry season. However, in last few years, in river discharge in dry season is very little, but in contrary, in wet season, frequency of flood increases with sharp peak and increasingly great water elevation. The increased flood discharge may occur due to change in land use or change in rainfall characteristic. Both matters should get clarity. Therefore, a research should be done to analyze rainfall characteristic, land use and flood discharge in some watershed area (DAS) quantitatively from time series data.The research was conducted in DAS Gintung in Parakankidang, DAS Gung in Danawarih, DAS Rambut in Cipero, DAS Kemiri in Sidapurna and DAS Comal in Nambo, located in Tegal Regency and Pemalang Regency in Central Java Province. This research activity consisted of three main steps: input, DAS system and output. Input is DAS determination and selection and searching secondary data. DAS system is early secondary data processing consisting of rainfall analysis, HSS GAMA I parameter, land type analysis and DAS land use. Output is final processing step that consisting of calculation of Tadashi Tanimoto, USSCS effective rainfall, flood discharge, ARIMA analysis, result analysis and conclusion. Analytical calculation of ARIMA Box-Jenkins time series used software Number Cruncher Statistical Systems and Power Analysis Sample Size (NCSS-PASS) version 2000, which result in time series characteristic in form of time series pattern, mean square errors (MSE), root mean square ( RMS), autocorrelation of residual and trend.Result of this research indicates that composite CN and flood discharge is proportional that means when composite CN trend increase then flood discharge trend also increase and vice versa. Meanwhile, decrease of rainfall trend is not always followed with decrease in flood discharge trend. The main cause of flood discharge characteristic is DAS management characteristic, not change in rainfall characteristic.Keywords: rainfall, land use, flood discharge, time series, main cause

EVALUATION OF SOIL EMBANKMENT MASS MOVEMENT BY USING SUBDRAIN SYSTEM AND REINFORCEMENT BASED ON THE NUMERICAL SIMULATION OF SEMARANG-SOLO TOLL ROAD Syahbudin Dayanun; Ahmad Rifa’i; Kabul Basah Suryolelono
Journal of the Civil Engineering Forum VOLUME: XXIII/1 - JANUARY 2014
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Semarang-Solo highway is a part of Trans Java Toll Road System, which in construction stage has soil embankment mass movement between Sta. 5+ 500, -5+800 part II Gedawang-Penggaron. In this case, research is conducted to again effective and efficient solution. The research object is soil embankment which moved on site. The research aim is to identify the cause of soil embankment mass movement, to know the effect of sub drain system to soil movement and also to provide alternative solution. Slope stability analysis was solved by Plaxis, based on topography, investigation data and field instrumentation after gain the validation result with accuracy of soil movement on horizontal direction of the slope, continued by simulation with variants model which affected by strength, loading combination (traffic load), water level (dry and raining season), sub drain system and earthquake. Horizontal movement result of simulation can be seen in location of inclinometer 4.The research result shown that soil movement pattern which strengthened with bored pile is sliding combination type of translation and rotation. The strengthened soil embankment mass with bored pile apparently still has movement as 0,246 m with SF 1,448. Due to traffic load, horizontal movement is 0,322 m with SF 1,368 where water level located in 5,5 m at BM 10 and 3,5 m at BM 11 and sub drain is pointed in 4 m mean depth. When rainy season the horizontal movement increase 0,324 m with SF 1,321 while in dry season become 0,320 m with SF 1,479. When sub drain existing reduce in average 2,0 m so horizontal movement also decrease as 0,254 m with SF 1,465. Earthquake simulation shown maximum horizontal movement is 1,422 m with SF 1,193. As alternative to minimize horizontal movement which cause by earthquake can be solved by reduce embankment height from 25,72 m to 20,72 m, simulation result provide horizontal deformation as 0,703 m with SF 1,567. In hence the existence of sub drain construction able to reduce horizontal movement of soil embankment mass in which increase the safety factor, reduction of embankment height also show positive impact and significant to horizontal movement due to earthquake.Keyword : soil mass movement, Plaxis program, sub drain system

TRAFFIC DISTRIBUTION STUDY ON MULTI-AIRPORT SYSTEMS IN THE GREATER JAKARTA METROPOLITAN AREA (GJMA) AND ASSOCIATED IMPLICATIONS Faiz Agung Perdana; Richard Moxon
Journal of the Civil Engineering Forum VOLUME: XXIII/1 - JANUARY 2014
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Multi-airport system development is becoming a common solution to capacity constraint problems in metropolitan areas around the world. GJMA, as the biggest air transport market in Indonesia, have a plan to change their airport system from a single airport system to a multi-airport system because of capacity constraints. To relieve the congestion problem in the existing airport, an expansion project and a new airport plan are being proposed by the government. The new airport will be located in a green-field site around a hilly area in the Karawang Regency and plans to start operating in 2019.The government has not yet decided on the roles of the airport, but only proposed several scenarios to distribute the traffic for both airports. This study aims to understand the configuration of the traffic distribution of the new multi-airport system environment in GJMA, using a five step strategic planning methodology (CAIAD) which stands for Collect information, Analysing, Imaging, Assessing and Deciding.The results of the study show that the traffic distribution can lead to implications on the existing and planned infrastructure, and for the airport users. The main implications are traffic volatility, underutilized airport infrastructure, traffic demand, that cannot be accommodated by the airports, operational difficulty and poor service for the airport users. To minimize these implications, the government should start planning the development of the new airport based on flexibility related to the actual traffic demand and improved the transport access facilities. This study also suggests two scenarios as options for the government to implement in the GJMA multi-airport environment.Keywords: GJMA Airports, Capacity Constraint, Regulations Policy, Underutilize Airport and Airport Development.

THE EFFICACY OF MOTORCYCLE TRAINING TO REDUCE SELF-REPORTED NEGATIVE BEHAVIOUR AND ATTITUDE (CASE STUDY IN UK AND INDONESIA) Winna Justiana Sirait; Sigit Priyanto; Samantha Jamson
Journal of the Civil Engineering Forum VOLUME: XXIII/1 - JANUARY 2014
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Motorcyclists are vulnerable road users because of their particular combination of physical vulnerability. Motorcyclists’ training and licensing system have already implemented in so many countries in the world particularly developed countries. In the other hand, there are countries, particularly developing countries, where motorcyclists are less regulated in term of licensing, enforcement, and insurance. Therefore the objective of this research are to analyses the behavior and attitude of motorcyclists in Yorkshire and Humber Region (UK) and Jakarta (Indonesia), and to analyses the efficacy of motorcycle training in UK to influence the self-reported negative behavior and attitude of motorcyclists.Motorcycle Rider Behavior Questionnaire (MRBQ) and Motorcyclists Attitude Questionnaire (MAQ) are used to conduct this study. The Mann Whitney test is used to evaluate the significance different of the mean score, which obtained from the survey in each country (UK and Indonesia).Mean score computation showed that Yorkshire and Humber Region’s respondents have better mean score than Jakarta’s respondents. However Mann Whitney test showed that the mean score different is not significant for speed violation factor in MRBQ and drink driving and speeding factor in MAQ.Keywords: motorcyclist, motorcycle training, Motorcycle Rider Behavior Questionnaire (MRBQ), Motorcyclist Attitude Questionnaire (MAQ).

A STUDY OF CAPABILITY AND WILLINGNESS OF LOCAL SOCIETY TO FUND THE OPERATIONAL AND MAINTANANCE OF POLDER IN BANGER RIVER SEMARANG Adi Jatmiko; Darmanto Darmanto; Sunjoto Sunjoto
Journal of the Civil Engineering Forum VOLUME: XXIII/1 - JANUARY 2014
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

East Semarang District deals with a very serious problem for flood and robs threat. Rob is caused by high tide in the sea, while flooding caused by heavy rainfall. Banger River conveys run off flow from East Semarang District to the sea. Banger Polder System comprises dike surrounding Banger Polder and also dam aimed to protect it from rob attack, pump Station to control the water level, and retention pond used also as fishpond. To maintain urban polder management and flood protection system, society participation is highly. The purpose of this research was to determine the willingness and capability of communities to pay the operational and maintenance of polder system. Research focused on Banger Polder Area located at 10 Sub Districts in East Semarang District with the scope of discussion is to assess the society willingness-capability to pay the operational and maintenance of polder system. Primary data were collected by Contingent Valuation (CV) sample survey method using closed ended referendum elicitation format (Bidding game format), or closed questions by providing an alternative of answers choice. Society willingness in funding the operational and maintenance of polder can be determined by maximal costs that have been paid by society required to cope with flood and inundation problem in Semarang District. Society capability in funding polder operational and maintenance can be showed as a relation between total income and maximal capability of society in funding polder operational and maintenance. Result of data analysis showed that 87% society is categorized as capable society, and 12.67% society is incapable in funding polder operational maintenance. Result of data analysis showed that 81.33% society having the willingness, and 18.67% as the rest in paying the operational and maintenance of polder. Percentage of society which has the willingness and capability is approximately 72%. Income, building and land asset were used as decision variable in estimating participatory rates, fair, equitable, and independent which is expected to be sustained.Keywords: Social willingness, social capability, polder operational and maintenance costs.

ANALYSIS OF SEDIMENT MOVEMENT IN A RIVER DIVERSION SYSTEM Agus Safari
Journal of the Civil Engineering Forum VOLUME: XXII/3 - SEPTEMBER 2013
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Sediment-related disaster especially debris flow occurs frequently in various places in Indonesia. It has been well known in general that debris flow contents big size of materials which huge power to destroy the river and surrounding area. Comprehensive measures and rising awareness to prevent the toll of human lives against sediment disaster is considered necessary. Diversion system to proximate river aimed to lessen sediment load by considering its capacities and sediment prevention facilities becomes an alternative counter measure of sediment flood disaster. Information of river diversion capability and associated phenomena due to sediment gravity flow is a fundamental desire for establishing reasonable sediment control plans. Physical model compared to simple mathematical model are conducted to know river diversion capacity to convey sediment. The experiment used a channel made of masonry with 80 cm wide in average and 400 cm length, and 10 % gradient. The proposed sediment control facilities comprises two types, there are open type dam with 33 cm wide, 16cm high (at +1.245m elevation of crest) and four slits in main stream river and close type dam 41 cm wide, 15 cm high (at +1.255m elevation of spillway) for river diversion. The distance of these facilities is 110 cm. The result of this study is expected to be able to explain the sediment gravity flow behavior in the field. It shows that the performance of river diversion and open type dam control volume depend on quantity and mechanism of sediment flow from upstream, and also elevation of crest of the open type dam. The largest amount of sediment gravity flow entering diversion channel is about 7 % of sediment inflow for +1245 m open dam crest elevation and +1255 m river diversion spillway elevation.Keywords: Natural disaster, sediment, river diversion system.

COMPEREHENSIVE TECHNICAL STUDIES OF FLOOD CONTROL OVER SOLO CITY AREA (CASE STUDY IN DEMANGAN BARRAGE) Ali Trusharyanto; Rachmad Jayadi; Darmanto Darmanto
Journal of the Civil Engineering Forum VOLUME: XXII/3 - SEPTEMBER 2013
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.18903

City of Surakarta, known as Solo City is one of cities in Central Java Province traversed by Bengawan Solo River. Heavy rainfall in upstream area of Bengawan Solo River causes increase in high water level at downstream. Bengawan Solo River will be higher than water level in drainage system which may induce a backwater flow. Since Colonization era, the government has built dikes and barrages against backwater flow and inundation problem. One of the barrages was Demangan Barrage dividing river flow into Bengawan Solo River and Pepe River. It was equipped with total capacity pump of 12,3 m3/s. The inundation is not only caused by the backwater flow coming from Bengawan Solo River, but also surface runoff as the result of the excess rainfall which cannot be drained gravitationally to the main river if the gate was closed. Therefore, comprehensive study combining hydrology and hydraulics analysis is highly needed in order to achieve more effective flood control management.Hydrology analysis was done to estimate the direct runoff hydrograph from catchment area in Solo City to downstream of Pepe River. While in hydraulics case, hydraulic parameter in downstream of Pepe River influenced by Bengawan Solo River stream was analyzed. Both studies were simulated using software HEC-RAS 4.1.0 version. The simulation considered drainage channel, gate, pump system and dike in Pepe River downstream.Simulation using 10 years of return period in Solo City and average annual water level in Bengawan Solo River showed that Pepe River can flow through the gate, while the highest water level is still below the dike. Simulation considering 10 years of return period, water level hydrograph of Bengawan Solo River, existing pump, and gate operation inferred that Pepe River surpassed top of dike. Capacity of required pump should be more than 168,3 m3/s in order to pass 10 years of return period. By combining operational of existing pump and dike elevated up to +87,63 m, capacity of required pump became lesser which was approximately 120,3 m3/s. Simulation of HEC-RAS conducted by operating pump automatically on critical elevation without heightened dike obtained the total capacity of pump was 132,3 m3/s.Keywords: barrage, pump operation, Bengawan Solo River, flood control management.

EVALUATION OF DISASTER MITIGATION SYSTEM AGAINST LAHAR FLOW OF PUTIH RIVER, MT. MERAPI AREA T. Maksal Saputra
Journal of the Civil Engineering Forum VOLUME: XXII/3 - SEPTEMBER 2013
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Merapi mount lies in the border of Yogyakarta and Central Java province. It frequently produces lava sediment deposit in the upper part of the mount, or is called as lava dome. During the rain, the sediment can cause secondary disaster in form of lahar flood, which is potential to produce casualties, especially to the miners working along the river. Kali Putih, that is located in Magelang regency, is the area that undergoes frequents lahar flood that is 125 times in the period of 1931-1996. Meanwhile, there are 5,076 sand miners there. Therefore, it needs an evaluation toward the existing mitigation system that is related to the safety of sand miners.The evaluation is done toward structural mitigation system (Sabo Dam) and non-structural one (e.g. early warning, counseling, and evacuation system). Structural mitigation system is evaluated by comparing the availability of control volume of Sabo Dam to the sediment load during lahar flood, and comparing the travel time of the lahar flood with and without Sabo Dam. Non-structural mitigation system is evaluated by testing the accuracy of the lahar flood estimation chart, and by identifying early warning equipment system installed in field. Interview is also conducted with the miners to see their perception and opinions toward the mitigation.Result of the evaluation shows that the existing early warning system does not produce sufficient time for the sand miners to save themselves. The proposed solution is to divide sand mine area in Putih River into 3 zones, each zone has different procedure of the early warning and evacuation. This is arranged to avoid casualties to the sand miners.Keywords: Lahar flood, sand miners, early warning.

EVALUATING AND DEVELOPING LOGISTICS SYSTEM FOR EXPORTING SMALL AND MEDIUM ENTERPRISES (CASE STUDY IN YOGYAKARTA PROVINCE AND ADJACENT AREAS, INDONESIA) Rizkie Syahputera
Journal of the Civil Engineering Forum VOLUME: XXII/3 - SEPTEMBER 2013
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Indonesia is ranked 75 of 155 countries in the world for the Logistics Performance Index. Thus, logistics services efficiency has to be improved to make sure SMEs can be more competitive and gain benefit from international trade arena. Yogyakarta with its viscous culture has become a favorite tourism destination, with many art craft products. Its unique location which far from seaport inflicts higher cost to the exporting cost. The study is to understand the system, understand the constraints and provide recommendation to improve the efficiency of current system.The study uses questionnaire survey as the method to gather the data. It consists of 2 surveys, on survey 1 on SMEs and survey 2 on forwarders. The analysis is mainly descriptive. Results of survey 1 are that the respondents are quite satisfied with current system which is 90% of total respondent, 82 % of total respondents never have problems with the customs, and the biggest problem is uncertain regulation. Results of survey 2 are 89 % of total respondent never have problem with customs, the biggest problem is bribery and uncertain regulations, and the time needed to export is quite long.The recommendations are established by developing 5th party logistics, constructing clear and market responsive regulations, and improving the facilities of transport infrastructure.Keywords: SME, logistics, Indonesia, export.

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