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All Journal Indonesian Journal of Geography Geo Media: Majalah Ilmiah dan Informasi Kegeografian Jurnal Ilmu Lingkungan Tunas Geografi Jurnal Teknosains Geoplanning : Journal of Geomatics and Planning Majalah Geografi Indonesia JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management Forum Geografi Jurnal Fisika FLUX JURNAL ILMIAH GEOMATIKA MAJALAH ILMIAH GLOBE Jurnal Sains Dan Teknologi (SAINTEKBU) Jurnal Geografi Jurnal Penelitian Kelapa Sawit Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital ASEAN Journal on Science and Technology for Development Jurnal Penginderaan Jauh Indonesia Journal of Sylva Indonesiana BIO-EDU: Jurnal Pendidikan Biologi Jurnal Pengabdian dan Pengembangan Masyarakat Jurnal Agriment International Journal for Disaster and Development Interface Prosiding Seminar Nasional Teknik Lingkungan Kebumian SATUBUMI Jurnal Spasial: Penelitian, Terapan Ilmu Geografi dan Pendidikan Geografi Jurnal Penginderaan Jauh Indonesia Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital
Sigit Heru Murti
Departemen Sains Informasi Geografi, Fakultas Geografi, Universitas Gadjah Mada
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Journal : International Journal for Disaster and Development Interface

 1 
Flood Potential Assessment of the Way Urang Sub-Watershed Based on Peak Discharge Using the Rational Method Zuhrita, Anissa; Wahyu, Hyundra Zakiya Putri; Handayani, Nelly; Milla, Helny Yofin Mega; Safitri, Nabila Zalianti; Murti, Sigit Heru; Sudaryatno
International Journal for Disaster and Development Interface Vol. 5 No. 2 (2025): October 2025
Publisher : Amcolabora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53824/ijddi.v5i2.112

Abstract

Peak discharge is a key indicator for assessing flood potential in a river basin. This study estimates peak discharge in the Way Urang sub-watershed, Pesawaran, Lampung, by integrating remote sensing and Geographic Information Systems (GIS) to derive physical parameters that control surface runoff. The Rational Method was applied, combining the runoff coefficient (C), rainfall intensity (I), and drainage area (A). The runoff coefficient was calculated using the Cook Method, which takes into account soil type, slope gradient, vegetation density, and drainage density. Rainfall intensity was derived from daily records using the Mononobe equation, with time of concentration estimated from the Kirpich formula. Data sources include Sentinel-2 imagery, DEMNAS, rainfall records from 2014 to 2023, and field measurements. The results show a peak discharge of 217.19 m³/s for a basin area of 20.20 km², with a coefficient of variation (C) of 69.20% and an intensity (I) of 55.89 mm/h. High runoff reflects the combined effects of low-infiltration soils, steep slopes, and high annual rainfall. Morphometric measurements yielded a total channel cross-sectional area of 27.91 m² and an estimated bankfull discharge of ~9.53 m³/s, indicating that the channel capacity is far below the peak discharge. This imbalance suggests a high flood potential in downstream areas, particularly in Bunut Village. The findings underscore the importance of integrating spatial data, field surveys, and remote sensing to analyze watershed physical characteristics and to support more effective, spatially informed flood planning and mitigation.
Co-Authors - Hartono Agus Joko Pitoyo Agus Prasetya Agustinus, A.K.A Ahmad Cahyadi **) Ai Siti Patimah Amru, Khaerul Andri Saputra Arina Miardini Arno, Giarno Artha Uli Simatupang Aryaguna, Prama Ardha Binsasi, Remigius Bintoro Saputro Bowo Susilo Bowo Susilo Chatarina Ganis Ratna Wardani Christian S. Imburi Cynthia Permata Sari Defri Mandoza Dhimas Wiratmoko Eko Haryono Erny Poedjirahajoe Erwika Dora Jati Fahmi, Said Giarno Giarno Hadiyan, Yayan Halvina Grasela Saiya Handayani, Nelly Hartono Hartono Hartono Hartono Hartono Hartono Hartono Hartono Hasibuan, Algi Variski Hatma Suryatmojo Hendy Fatchurohman Hudaya, Yudi Fatwa Indra Agus Riyanto Irsan, Laode Muhamad Jati, Erwika Dora Jaya, Risman Khaerul Amru Kurniawan Sigit Wicaksono Langgeng Wahyu Santosa Luthfi Muta'ali Mariah Ulfa Masrur Alatas Milla, Helny Yofin Mega Moehar Maraghiy Harahap Muhammad Pramono Hadi Muhammad Pramono Hadi, Muhammad Pramono Muhammad Sulaiman Mutia Herni Ningrum Netty Dahlah Uar Ningrum, Mutia Herni Ningrum, Ratna Kusuma Nur Aziz Widodo Nurani, Ratna Nurul Astuti, Nurul Pendi Tri Sutrisno Prabang Setyono Pramaditya Wicaksono, Pramaditya Prihantarto, Wikan Jaya Prima Dinta Syam Prima Widayani Projo Danoedoro R. Suharyadi Raras Endarto Raras Endarto Retno Peni Sancayaningsih RETNO PENI SANCAYANINGSIH S Suratman Safitri, Nabila Zalianti Said Fahmi Sanjiwana Arjasakusuma Setyowati, Heratania Aprilia Slamet Suprayogi Slamet Suprayogi Slamet Suprayogi Sri Rahayu Budiani Su Ritohardoyo Sudaryatno Sunarto Sunarto Suprapto Dibyosaputro Suratman Suratman SUWARNO HADISUSANTO Taufik Hery Purwanto Tjahyo Nugroho Adji Totok Gunawan Totok Gunawan Totok Gunawan Totok Gunawan Wa Alimuna Wahyu, Hyundra Zakiya Putri Widhi Himawan Widyatmanti, Wirastuti Wikan Jaya Prihantarto Yanuar Adji Nugroho Yayan Hadiyan Yudi Fatwa Hudaya Yudi Fatwa Hudaya Zuhrita, Anissa Zulfajri Zulfajri, Zulfajri