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All Journal JURNAL TEKNIK HIDRAULIK CSID Journal of Infrastructure Development
Wimordi, Calvin
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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Engineering Social Sciences

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Evaluasi Muka Air Banjir pada Saluran Ranca Mekar akibat Pengembangan Kawasan Rumah Ibadah di Rancasari Wijaya, Tasya; Wijaya, Obaja Triputera; Wimordi, Calvin
JURNAL TEKNIK HIDRAULIK Vol 16, No 2 (2025): Jurnal Teknik Hidraulik
Publisher : Direktorat Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v16i2.810

Abstract

Uncontrolled land-use changes are a significant factor contributing to flooding, particularly in urban areas. A plot of land in the city of Bandung is planned to be developed into a place of worship. Due to the existing topographic conditions and future planning by the local government, a drainage channel will be constructed to convey runoff from the religious facility area and the adjacent western area to the Ranca Mekar drainage channel. This study examines the impact of runoff from these two areas on the flood water level in the Ranca Mekar drainage channel. Based on the analysis, the runoff from these areas increases the flood water level (MAB) in the Ranca Mekar channel by 20-25 cm for both 2-year and 10-year return periods. This increase in flood water level is exacerbated by blockages in segment J10, caused by channel narrowing and an upward slope. Additionally, sedimentation issues along the channel reduce its capacity. The study also evaluates three alternative solutions to address these problems. The results show that reducing the slope of the channel bed in segments J10-J12 can lower the flood water level by 11 cm, whereas widening the channel dimensions in segment J10 is less effective, reducing the water depth by only 5 cm. A combination of both alternatives results in a 12 cm reduction in flood water level in segment J10 for both the 2-year and 10-year return periods. Although some alternative solutions have been effective in reducing the flood water level, further studies are required to evaluate runoff management strategies in both the religious facility gereja area and the western region. Potential measures include the implementation of retention ponds, infiltration wells, and other mitigation approaches.
Water Quality Modelling to Predict BOD And TP Loads of Duriangkang Dam Wimordi, Calvin; Yudianto, Doddi; Yiqing, Guan
CSID Journal of Infrastructure Development Vol. 3, No. 2
Publisher : UI Scholars Hub

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Abstract

Water quality modeling is highly needed to predict and to identify the water quality alteration and distribution along the water body. Besides that, water quality modeling also can be used to predict the pollutant load if there is no data recording. The water quality analysis simulation program (WASP), will be used in this study to forecast domestic load, in particular BOD and TP loads in Duriangkang Dam. Initially, the estimated load is obtained based on the previous study that being extended by using a linear regression line. After that, the estimated load is calibrated according to the results of the water test. The WASP model is simulated for a period of 3 years from 1 January 2016 to 31 December 2018 and is divided into 2 processes, namely calibration and verification process. The calibration process is carried out in the first two years, followed by the verification process for the remainder of the year. The calibration and verification process are measured by objective functions, namely RMSE and the percentage difference. According to the simulation results, the objective functions provide satisfying findings, which means that the predicted BOD and TP loads for Duriangkang Dam during that time are accurate.
Co-Authors Doddi Yudianto Wijaya, Obaja Triputera Wijaya, Tasya Yiqing, Guan