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All Journal Jurnal Spektran Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Ilmu Lingkungan Jurnal Teknik Sipil Research Report - Engineering Science Jurnal Teknik Sipil Sinergi Rekayasa Sipil Journal of the Civil Engineering Forum Jurnal Rekayasa Konstruksi Mekanika Sipil JURNAL TEKNIK HIDRAULIK JURNAL SUMBER DAYA AIR CSID Journal of Infrastructure Development (CSID-JID) Journal of Infrastructure and Facility Asset Management Journal of the Civil Engineering Forum CSID Journal of Infrastructure Development
Doddi Yudianto
Department Of Civil Engineering, Faculty Of Engineering, Parahyangan Catholic University
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Mathematics Social Sciences Transportation

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Pemodelan Kualitas Air Sungai Cikakembang akibat Pembuangan Limbah Organik Menggunakan HEC-RAS Yudha Primus Kristianto; Doddi Yudianto; Finna Fitriana
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.v16i2.841

Abstract

The Cikakembang River, a tributary of the Citarum River in Majalaya District, has been polluted due to domestic and textile industrial activities. Although the Citarum Harum program, initiated in 2018, has been considered successful in improving water quality in the Citarum River, pollution in the Cikakembang River remains a serious issue. This study aims to analyze the impact of organic waste disposal on the water quality of the Cikakembang River using HEC-RAS. The modeling results obtained are then used as a basis for formulating pollution control strategies. This study focuses on four water quality parameters: BOD, DO, NH₃-N, and TP. In addition to field measurements of various technical data, this study also includes laboratory testing of twelve (12) water samples taken along the Cikakembang River. The data obtained are used to calibrate a mathematical model with statistical bias and relative error analysis as the objective function. Based on water quality testing results, it was found that the concentrations of BOD, DO, NH₃-N, and TP in the Cikakembang River do not meet Class II water quality standards as stipulated in Government Regulation No. 22 of 2021. Furthermore, HEC-RAS simulation results with various pollution control scenarios indicate that the existing conditions cannot fully address the issue. Therefore, stricter monitoring measures are needed for wastewater quality discharged into the water bodies, including enhancing the capacity of wastewater treatment plants and optimizing river rehabilitation programs to sustainably reduce pollution in the Cikakembang River.
3D Numerical Modeling of Flood Spillway Structures: Challenges and Design Implications Akafi, M. Ma'ruf; Yudianto, Doddi
Jurnal Teknik Sipil Vol. 26 No. 1 (2026): Jurnal Teknik Sipil Universitas Tanjungpura
Publisher : Fakultas Teknik Universitas Tanjungpura

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Abstract

Physical modeling has long been the primary approach for studying flow behavior in hydraulic structures, yet such models often require considerable cost, time, and effort. The growing capabilities of computational fluid dynamics (CFD) have encouraged the use of three-dimensional (3D) numerical simulations as an efficient alternative. This study reviews recent advances and persistent challenges in 3D numerical modeling of spillway structures, with emphasis on design implications. The findings reveal that reliable 3D simulation of spillways is constrained by mesh sensitivity, turbulence model selection, boundary condition specification, and time-step dependence. Complex spillway geometries and substantial computational demands further complicate model development. Moreover, validation remains challenging due to scale effects and limited availability of high-quality experimental or field data. To improve model reliability, careful optimization of numerical configurations is essential. Mesh and time-sensitivity analyses, appropriate turbulence models, and field-based boundary conditions should be applied to achieve representative results. Integrating numerical and experimental approaches can enhance model validation, reduce uncertainty, and strengthen the use of 3D numerical modeling as both a predictive and design tool for safer, more efficient, and sustainable spillway structures.
Kelayakan Penerapan Pembangkit Listrik Hibrida di Bendungan Matenggeng Evely Tirza; Doddi Yudianto; Okky Ahmad Purwana
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 31, Nomor 1 (2025)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v31i1.70819

Abstract

Indonesia’s is focusing the electricity power production from non-renewable sources to renewable energy resources. Hydropower might be promising; however, its production is highly affected by seasonal variability. Matenggeng dam is designed as multipurpose dam, namely for supplying the irrigation system, flood control, and utilization in a hydropower system. Based on its design report, the Matenggeng Dam is planned to produce power of about 11.74 MWac at water elevation of +194 m. Due to seasonal variability, the power production decreases to 5.74 MWac at the lowest water elevation. Solar energy, on the other hand, has a great potential in Indonesia, this study is aimed to optimize the decrease in existing electricity production in Matenggeng Dam by hybridization of hydropower with floating solar power plants. According to the regulation of Indonesia’s public affair only 20% of the water surface area at normal condition can be used. By taking into account the reservoir operation pattern and the reservoir various conditions, the optimum water surface area that can be used for FPV installation is 295.7 hectare. The result showed that, the solar power plant successfully produces 14 GWh of energy annually, where the monthly generation is stable at 1,200 MWh per month.
Co-Authors Adhita Prasetya Adidarma, Wanny Akafi, M. Ma'ruf Albert Wicaksono Andreas F. V. Roy Angela Grace Ariberto Jonathan Bambang Adi Riyanto Bambang Adi Riyanto Bobby Minola Ginting Christopher, Cleon Cleon Christopher EKo Winar Irianto Evely Tirza Ezzy Yuanita Farrell Wiguna Farrell Wiguna Finna Fitriana Fiona, Megan Gao, Cheng Guan, Yiquing Hidayat, Ivana Nathalia Irianto, Eko Winar Jonathan Wijaya Jose Cristobal Kent, Steven Li, Ren Muhamad Demirel Prasetya Muhammad Raul Zahran Wiryawardhana Obaja Triputera Wijaya Okky Ahmad Purwana Polisar, Andrea Prasetya, Adhita Prilla Lidyana Qiaoling Li R. Wahyudi Triweko Rahmat Sudiana Robertus Wahyudi Triweko RW Triweko S Sanjaya S Sanjaya Sabu, Maria Kalista Hadia Sanjaya, S Sanjaya, Stephen Seo, Yong Chan Steven Kent Tandiono, Felix Theo Senjaya Theo Senjaya Triweko, Robertus Wahyudi Waluyo Hatmoko Wang, Qian Wanny K Adidarma Wanny K. Adidarma Willy Aulia Willy Willy Willy Willy Wimordi, Calvin Wimordi, Calvin Xie Yuebo Xie Yuebo Xie Yuebo Yiqing, Guan Yiqing, Guan Yiquing Guan Yong Chan Seo Yudha Primus Kristianto Yuebo, Xie Zhang Xiuju