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All Journal Program Kreativitas Mahasiswa - Pengabdian Kepada Masyarakat The Spirit of Society Journal : International Journal of Society Development and Engagement Devotion: Journal of Research and Community Service Journal of Social Research COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat International Journal of Hydrological and Environmental for Sustainability TRANSPUBLIKA INTERNATIONAL RESEARCH IN EXACT SCIENCES (TIRES) International Journal on Advanced Technology, Engineering, and Information System (IJATEIS) Menara Pengabdian INJURITY: Journal of Interdisciplinary Studies Jurnal Teknik Indonesia Enrichment: Journal of Multidisciplinary Research and Development Jurnal Media Ilmu JAT (Journal of Accounting and Tax) International Journal of Social Science and Community Service
Esti Wulandari
Pendidikan PKn, FPIPS, IKIP PGRI Madiun
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Physics Public Health Social Sciences Transportation Other

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Integrated Flood Risk and Embankment Stability Modeling in the Comoro River, Timor-Leste using HEC-RAS and GIS Minaryo, Kris; Tjendani, Hanie Teki; Wulandari, Esti; Junaidi, Rahmad; Andiyan, Andiyan; Omanwar, Shreeniwas
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 3 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i3.961

Abstract

Dili, the capital city of Timor-Leste, is increasingly vulnerable to flooding due to its geomorphological characteristics and rapid urban expansion. The Comoro River, the largest of several rivers traversing the city, has experienced multiple significant flood events in recent years—most notably in March 2020, April 2021, and February 2022 resulting in severe damage to infrastructure and disruption to local communities. Urban development has led to watershed degradation, sediment accumulation, reduced channel capacity, and embankment overtopping, exacerbating flood risks in densely populated areas. This study aims to assess flood risk and evaluate embankment resilience using an integrated modeling approach. Design flood discharge was estimated using the Log Pearson Type III distribution and the Nakayasu synthetic unit hydrograph, with validation through Chi-Square and Kolmogorov-Smirnov goodness-of-fit tests. Hydraulic simulations were conducted using HEC-RAS 6.1.0, while flood inundation mapping was performed with ArcGIS 10.3 to identify critical flood-prone zones and guide mitigation strategies. Results indicate a peak discharge of 192.141 m³/s for a 25-year return period flood. Mitigation measures proposed include embankment construction and river normalization at vulnerable cross-sections. HEC-RAS simulations demonstrate that these interventions significantly reduce flood inundation. The embankment slope stability factor was calculated at 14.25, indicating a high level of structural safety. The estimated cost for implementing these flood control measures is USD 571,366.87. This study provides a replicable framework for flood hazard modeling and infrastructure planning in urban river systems, contributing to climate-resilient development and evidence-based decision-making in Southeast Asian contexts.
Co-Authors Adiputra, Reza Agus Firmanda, Yocky Alves, Agata Maria Orleans Andiyan Ardianto, Lukman Ariyanti, Menik Atwin Suyitno, Dwi Brian V P, Andreas Budi Witjaksana, Budi Candra M, Alang Danang Dwi Nugroho Djoko Nugroho, Laksono Dozier, Alpha Ekawati, Ridania Fakhrurrozi, Muhamad Fathurokman, Hasan Alif Gatot Dwi Wahyono Gode, Dicky godinho, domingos Gomes, Orlando Guesa Maiwinda Hadi, Suprapto Hanie Teki Tjendani, Hanie Teki Hartawan, Ade Sholeh Hudyantoro, Hudyantoro Jamiludin, Jamiludin Jarwoto, Jarwoto John, Jenodius Aldino Laksono Djoko Laksono Djoko Nugroho Lina Yuliani Luis, Laurenco Maya Yusnita Minaryo, Kris Muchamad Lutfi, Muchamad Muhammad Efendi, Muhammad Nailufar, Linda Naldi, Jepri Nopriyanto, Dwi Erry Nugroho, Laksono D. Nurrahmat, Ean Fadhillah Oetomo, Wateno Omanwar, Shreeniwas Patriadi, Andi Prasetiyo W., Arif Pratiwi, Sekar Harum Purbo, Atma Djendra Putri, Mia Dewindi Rahmad Junaidi, Rahmad Sajiyo Sajiyo, Sajiyo Septiana, Vini Wela Septoraharjo, Eko Rony Septria, Metriani Setiyo, Anugrah Dwi Setyarini, Ika Oktavia Slamet Riyadi Sulistianto, Leo Agus Suprapto, Aki’ Supriyanto, Yunaidi Susanti, Dini Teki Tjendani, Hanie Umarwoko Daniarto, Cornelius Ummatus Sholikhah, Ummatus Venusia A, M. Fajar Widhajati, Eni Windarti Agustina Zainal Muttaqin, Muhammad