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All Journal Jurnal Teknik Pengairan: Journal of Water Resources Engineering Jurnal Teknologi dan Rekayasa Sumber Daya Air
Putra, Farhan Akbar Darma
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Earth & Planetary Sciences Engineering

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Pemetaan Limpasan Permukaan Menggunakan ArcSWAT untuk Penentuan Daerah Rawan Banjir pada DAS Gembong Putra, Farhan Akbar Darma; Harisuseno, Donny; Haribowo, Riyanto
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 5 No. 1 (2025): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2025.005.01.009

Abstract

Peningkatan pertumbuhan penduduk di Indonesia menyebabkan perluasan kawasan perkotaan dan pengurangan hutan, mengakibatkan konversi lahan yang tidak terencana dan penurunan infiltrasi tanah yang berdampak pada limpasan permukaan. Studi ini bertujuan memetakan limpasan permukaan di DAS Gembong, Jawa Timur, menggunakan model hidrologi Soil and Water Assessment Tool (SWAT) yang terintegrasi dalam Sistem Informasi Geografis (SIG) melalui ArcSWAT untuk memberikan rekomendasi pengelolaan sumber daya air berkelanjutan. Data dikumpulkan dan dianalisis untuk menghasilkan pemodelan limpasan permukaan tahun 2022. Hasil menunjukkan rata-rata limpasan permukaan di DAS Gembong adalah 942,31 mm/tahun, dengan Sub DAS 1 memiliki nilai tertinggi (1209 mm/tahun) dan Sub DAS 13 terendah (716,46 mm/tahun). Sekitar 18,62% dari luas DAS berisiko tinggi terhadap banjir. Penelitian ini menggarisbawahi pentingnya pemetaan hidrologi untuk mitigasi banjir dan pengelolaan sumber daya air yang efektif di wilayah yang mengalami urbanisasi cepat.
The Effect of Groundsills on the Degradation and Aggradation Processes of the Parit Raya Riverbed Andriantari, Nur Fadhlillah; Andawayanti, Ussy; Hendrawan, Andre Primantyo; Putra, Farhan Akbar Darma
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 16 No. 2 (2025)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2025.016.02.8

Abstract

Parit Raya is part of the drainage system of the Ngasinan River in Trenggalek and Tulungagung regencies. It is designed to reduce flooding and manage waterlogging caused by the construction. However, in the rainy season, the high flow velocity often causes damage to groundsills, triggering riverbed degradation or aggradation. This study aims to analyze the degradation and aggradation phenomena in Parit Raya River and the effect of two groundsill to reduce these actions using Hydrologic Engineering Center’s River Analysis System (HEC-RAS) simulations. The flow and sediment dynamics analysis uses Meyer Peter Müller (MPM), Engelund Hansen, and Laursen Copeland methods. The research locations focus on three river sections, consisting of 74 cross-sections, with two groundsills. By using the MPM, Englund-Hansen, and Laursen-Copeland methods modeled in HEC-RAS 6.0.0 software, this study can help in evaluating the effectiveness of groundsills in controlling sediment, preventing excessive erosion, and maintaining the stability of other hydraulic structures in rivers. The analysis reveals that conditions upstream of the groundsill tend to experience aggradation due to sediment deposition in STA 120, STA 103.60, and STA. 79.40, downstream conditions are characterized by degradation, indicated by riverbed erosion resulting from increased flow velocity between STA 120 and STA 47. Among the methods applied, the MPM and Engelund-Hansen methods provided results that closely align with field conditions compared to the Laursen-Copeland method.
Co-Authors Andre Primantyo Hendrawan Andriantari, Nur Fadhlillah Donny Harisuseno Riyanto Haribowo Ussy Andawayanti