Journal of the Civil Engineering Forum
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.
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<![CDATA[Typical Rainfall Distribution Pattern of Flood Event Caused by Tropical Cyclone at Bima City, West Nusa Tenggara, Indonesia ]]>
<![CDATA[Rachna Sok]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.34604
<![CDATA[Tropical cyclones are the most serious meteorological phenomena that hit Bima city in December 2016. The strong winds and heavy precipitation associated with a typhoon significantly affect the weather in this city. The impact of a tropical cyclone on precipitation variability in Bima is studied using rainfall data for analyzing hourly rainfall distribution pattern during the event. Depend on the geographic situation and climate characteristic, the hourly rainfall distribution pattern of one area is different to others area. The research aims to analyze hourly rainfall distribution pattern in the form of the rainfall intensity distribution. This research is conducted using one automatic rainfall gauge in Bima city, West Nusa Tenggara province that obtained from Regional Disaster Management Agency (BPBD). The results showed that two events of rainfall were recorded. The first rainfall event was on 20th to 21st December 2016 with a total rainfall 191.4 mm. The second rainfall event occurred on 22nd to 23rd December 2016 with a total rainfall 126.2 mm. The rainfall distribution pattern has rainfall intensity peak at 45% of duration with cumulative rainfall reached 70%. It was found there is no common pattern of temporal rainfall distribution for rainfall induced by tropical cyclones.]]>
<![CDATA[Cost Comparison of Drainage Channel Construction Considering Uncertainty of Rainfall Distribution ]]>
<![CDATA[Intan Supraba]]>;
<![CDATA[Istiarto Istiarto]]>;
<![CDATA[Radianta Triatmadja]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.39121
<![CDATA[Rainfall data is the main parameter to design drainage channel. The accuracy of rainfall data determines the accuracy of peak discharge estimation that is used for designing the drainage channel for flood mitigation purpose. The previous study presented that uncertainty of peak discharge is associated with the uncertainty of rainfall distribution and uncertainty of water holding capacity. The main purpose of this study is for understanding the sensitivity of rainfall data by comparing the estimated cost to construct drainage channel based on different values of peak discharges using two different rainfall data set which one rainfall data is created by considering 10% uncertainty of rainfall distribution. This study area is located on Plampang, Sumbawa Besar, West Nusa Tenggara. Results showed that the total cost to construct drainage channel increased by 15% if considering 10% uncertainty of rainfall.]]>
<![CDATA[Design of a Facility for Tsunami Run up Generation to Study Tsunami and Seawall Interaction ]]>
<![CDATA[Warniyati Warniyati]]>;
<![CDATA[Radianta Triatmadja]]>;
<![CDATA[Nur Yuwono]]>;
<![CDATA[David S. V. L Bangguna]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.39130
<![CDATA[Experimental researches on the tsunami in the laboratory have been conducted using various methods. The use and techniques of tsunami wave generator depend on the objective of the tsunami observation to be conducted. When the objective is the scouring at the downstream of a seawall, the use of a short flume with control discharge seems to be appropriate. A valve with a mechanic controller was equipped to control the discharge from a reservoir into the flume. A numerical simulation of discharge into the flume and the overflow above the seawall was conducted to determine the dimension of the tsunami flume and its generator before construction. The experiments were conducted to simulate the hydrograph of tsunami overflow above the seawall model. The numerical hydrograph is found to be comparable with the experimental hydrograph. This indicates that the tsunami wave generator is capable of simulating tsunami hydrograph and ready for further use of simulations.]]>
<![CDATA[Application of SWAT Model for Assessing Water Availability in Surma River Basin ]]>
<![CDATA[Syeda Zehan Farzana]]>;
<![CDATA[Md. Abu Zafor]]>;
<![CDATA[Jabed Al Shahariar]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.39191
<![CDATA[Water discharge is a significant hydrological parameter because it defines the shape, size and course of the stream. This study was initiated to evaluate the performance and applicability of the physically based SWAT model in analyzing the influence of hydrologic parameters on the streamflow variability and estimation of water balance components at the outlet of Kanaighat streamflow station (SW266) of Surma basin. A 30-m resolution digital elevation model (DEM) has been used to delineate catchment boundary. Land use map obtained from global source GLOBCOVER (Europe Space Agency) has been reclassified to match the SWAT land classes. The model was first calibrated for the period from 2003 to 2008 and then validated for the period from 2009 to 2013 using the observed monthly discharge data. Statistical model performance measures, coefficient of determination (R2) of 0.780, the Nash–Sutcliffe Index (NSI) of 0.47 and Percent bias (PBIAS) of -53.5%, for calibration and 0.878, 0.74 and -31.7%, respectively for validation, indicated good performance of the model simulation on monthly time step. The results showed that SWAT can simulate the hydrologic characteristics of the watershed very well.]]>
<![CDATA[Predicting the Required Volume Need for Architectural Work Using Artificial Neural Networks in Hospital Buildings ]]>
<![CDATA[Aulia Yudha Prathama]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.39772
<![CDATA[Decision-making in construction design has an important role. The need for estimation tools of planning and project management aspects needs to develop. This paper discussed the benefits of artificial neural network methodology to overcome the problem of estimated the needs of the volume of wall paired, ceiling worked pairing, and ceramic floor pairing for architectural work at the designed stage of the building. The average architecture cost of state building is 29%-51% of total construction value. Data from 15 projects was used for being trained and tested by Artificial Neural Network (ANN) methods with 5 design input variables. The ANN helped to estimate the value of volume requirement on the architectural working of Pratama Hospital building project in remote areas of Indonesia. Those input variables include building area, average column span distance, the height of the building, the shape of the building, and a number of inpatient rooms. From ANN simulation, the best empirical equation of P2V5 modeling was used to predict the need of hospital architecture work volume at conceptual stage with best ANN structure 5-9-3 (5 input variables, 1 hidden layer with 9 neurons and 3 output) with result of estimation accuracy a maximum of 96.40% was reached.]]>
<![CDATA[Designing of Flow Mortar Design Mix for Self Compacting Concrete (SCC) with FWC = 0.4 ]]>
<![CDATA[Noor Adi Wibowo]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41014
<![CDATA[ Self Compacting Concrete (SCC) is an innovation to produce concrete that could flow independently without being compacted. One of the practical methods is by making the mortar mix design first. The purpose of this research was to find optimum value of the flow mortar which will be base in the design of self-compacting concrete; and to find the optimum ratio of the mortar’s absolute volume to the volume of coarse aggregate cavity. The mortar material used type I cement, silica fume content 10% of cement weight, ratio of cement and grade III cement was of 1:1.25; water-cement factor of 0.4; and superplasticizer content of 0.3%, 0.4%, 0.5%, and 0.6% of cement weight. In this design of self-compacting concrete, the ratio of mortar absolute volume to coarse aggregate cavity were of 1.4, 1.6, and 1.8 with size of coarse aggregate of 10-20 mm. This research showed the optimum content of superplasticizer on mortar was of 0.6% which resulted slump flow of 260 mm, and compressive strength of 57.44 MPa. The testing result of SCC showed optimum value on ratio of mortar absolute-volume to coarse aggregate cavity was of 1.8 resulted slump flow of 280 mm, and compressive strength of 65.76 MPa.]]>
<![CDATA[Structural and Non-Structural Assessment of Flood Control in Gunting River, Jombang Regency, East Java Province ]]>
<![CDATA[Supriyono Supriyono]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41018
<![CDATA[Gunting River which is located in Jombang Regency of East Java Province, Indonesia encounters frequent flood event almost every year. It causes many problems in transportation, health, and economic activity. Thus, flood control which has been implemented in this area needs to evaluate. Design flood was analyzed using HEC-HMS 4.0 Software, while the hydraulic modeling used the unsteady flow simulation model by HEC-RAS 5.0.3 Software. The flood control simulation was conducted with 2 and 10-years return period. The simulation results with the normalization for 2-years (Q2) and 10-years return period (Q10) can effectively accommodate the exceed of flood discharge and lower the depth of runoff depth. The combination of normalization and embankment for can drain the maximum discharge up to 508.75 m3/s, and decrease run-off depth of 2.65 m. The land conservation of 17.8 km2 of the upper area in the watershed has lower the flood depth up to 0.16 m.]]>
<![CDATA[Optimization of Embung Jinggring for Water Resources Development of the Sadar Watershed, Mojokerto, East Java ]]>
<![CDATA[Reja Putra Jaya]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41133
<![CDATA[Embung is a small reservoir which can reserve water exceeds during the rainy season and utilize it on dry season. It is utilized for many purposes, such as providing water for agricultural purposes, fishery, and household needs. Jinggring Weir which is located at Mojokerto Regency, East Java Province is planned to enhance as embung to be able to provide higher water demand services. An appropriate method of water demand optimization study is important for reservoir water management operation to estimate water supply reliability both used for irrigation as well as domestic water. The Mock method was used to analyze water availability, while irrigation, and domestic water requirement, global water balance, simulation of the reservoir operation was analyzed based on Standard Operating Rule (SOR) method. The linear program method is used to determine an appropriate amount of water released to reach the optimum value of water supply reliability. The result of the simulation of target released using SOR method showed that the embung reliability for irrigation and domestic purpose increased from 81.55% to 100% and 80.09% to 100%, respectively.]]>
<![CDATA[Performance Evaluation and Pounding Effects between KPFT Building Alternative Design for SGLC Building ]]>
<![CDATA[Rusgiyanto Rusgiyanto]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41163
<![CDATA[Main Office building of the Faculty of Engineering (KPFT) is one of the buildings located within the complex of the Faculty of Engineering, Universitas Gadjah Mada. There is a plan to build a new building adjacent to the KPFT building. The design can interact simultaneously in support of earthquake so that the pounding effect can occur. The pounding effect due to earthquake loads is to improve the quality of KPFT building. This study applies numerical study to determine the effect of adding new structures around the old structure. This research uses 3 structure models, i.e. KPFT building without a wall (SKTD), the new Smart and Green Learning Center (SGLC) structure (SB), and the composite building (SG). This research uses linear time history analysis. There are 3 earthquake records including Superstition Hills-02, Darfield New Zealand, and El Mayor-Cucapah. The results shows story drift from the KPFT building (SKTD model) is reduced after the adjacent building has occurred. The performance level for SKTD models is Life Safety (LS), whereas the performance level for KPFT building after combining with the new structure is Operational (OP). The KPFT building after combining with new structure has a better performance level due to its drift ratio.]]>
<![CDATA[Water Quality Index Performance for River Pollution Control Based on Better Ecological Point of View (A Case Study in Code, Winongo, Gadjah Wong Streams) ]]>
<![CDATA[Sri Puji Saraswati]]>;
<![CDATA[Mochammad Venly Ardion]]>;
<![CDATA[Yul Hendro Widodo]]>;
<![CDATA[Suwarno Hadisusanto]]>
<![CDATA[ Journal of the Civil Engineering Forum Vol. 5 No. 1 (January 2019) ]]>
Publisher : <![CDATA[Department of Civil and Environmental Engineering, Faculty of Engineering, UGM ]]>
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DOI: 10.22146/jcef.41165
<![CDATA[The quality of river water quality monitoring data sometimes can be inaccurate. Evaluation of the effectiveness of water pollution control programs needs good quality data to calculate the Water Quality Index (WQI) with the aim to meet the requirement to protect biodiversity and maintain various water functions. Thirty-five water quality variables from Code, Gadjah Wong, and Winongo rivers were taken as data, conducted by Environmental Agency of Yogyakarta in 2004 – 2015. There were only 19 out of 35 water quality variables having good data after improvement of monitoring data, transformation/standardization and analysis of the significant water quality variables with PCA (Principle Component Analysis) and Factor Analysis (FA). WQIs formula in the three rivers used the same 5 significant variables i.e. EC, DO, COD, NH3N, Total Coliform, and "weighted sum index” as the sub-index aggregation technique, with different sub-index coefficients. Winongo River had the best water quality and Gajah Wong River was the worst. According to the relationship of river water discharge and WQIs index, large discharge during rainy seasons does not always decrease the level of pollution, but it tends to increase the WQIs. More effective ways to improve the stream water quality during dry seasons should further be investigated.]]>
