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Journal : Civil Engineering Journal

A Model for the Reduction of Flood Peak Discharge (ΔQp) Due to the Retarding Basin Yuwono, Hari; Limantara, Lily M.; Sholichin, Moh.; Siswoyo, Hari
Civil Engineering Journal Vol. 11 No. 12 (2025): December
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-12-012

Abstract

This research aims to develop a model for flood peak discharge reduction (ΔQp) through the placement of retarding basins within a watershed system, represented by the area ratio of the controlled watershed (RAk) and the maximum storage capacity of the retarding basin (Vk). The area ratio of the controlled watershed (RAk) is defined as the ratio between the catchment area of the retarding basin and the total watershed area (Ak/A). The methodology involves simulating various retarding basin placements (RAk) and different maximum storage capacities (Vk) for several flood return periods (QT). This study was conducted in the urban agglomeration area of Wonosari, Gunungkidul Regency, Special Region of Yogyakarta, Indonesia. The placement and utilization of retarding basins result in varying levels of flood peak discharge reduction (ΔQp) at the downstream control point (Taman Pancuran), depending on the maximum storage capacity of the retarding basin (Vk) and its placement within the watershed (RAk). The resulting empirical equations for flood peak discharge reduction (ΔQp) using the retarding basin method are as follows: ΔQp = 0.105654 − 0.014593 Vk − 0.029251 RAk + 0.011089 QT for Vk values in the range (V1–V4) = 36.4–208.8 × 10³ m³, and ΔQp = 1.374989 − 0.003702 Vk − 0.338381 RAk + 0.004773 QT for Vk values in the range (V4–V200) = 136.2–7039.1 × 10³ m³. An observed anomaly was identified, where ΔQp became positive at small values of Vk and RAk, indicating an increase in peak discharge (Qp).
Co-Authors A'mal, Bayhaki Izatul Adristi Nur Camila Agripina, I Gusti Ayu Widi Ahmad Firman Nur Rachman Alfaridzi, Em Rafif Sultan Amik, Arra Misrokhis Andini, Rika Septian Andre P. Hendrawan Andre Primantyo Hendrawan Anggara W. WS Anggara Wiyono Wit Saputra, Anggara Wiyono Wit Anggara WWS Arianti, Natalia Deassy Arief, Amalia Mardhatillah Asprilian, Gio Fonseca Aulia Shinta Balqis Azhar, Rifqi Fajar Bernadine, Eva Brafianto, Alvito Budi Prayogo, Tri Dasapta Erwin Irawan Dasapta Erwin Irawan, Dasapta Erwin Donny Harisuseno Dwi Priyantoro Dyah Laksmi Wahyusetyaningtyas Emma Yuliani Eri Widayanti Faizal Abdillah Faizal Abdillah Fatikasari, Cindi Hakim, Muhammad Naufal Handini, Maya Harganto, Satrio Hermalia, Novela Laurenz Desy Hisbulloh, Robiq I Gusti Ayu Widi Agripina Irawan , Dasapta Erwin Irvandi, Mukhlis Arief Jadfan Sidqi Fidari Joko Kurniawan Khabib, Muhammad Lukman Kurniawan, Joko Kusuma, Fajar S.H. Limantara, Lily M. Linda Prasetyorini Luh Natasya Karini Putri Luthfi Inayah M. Bisri M. Taufiq Ma'arif, Mohammad Syaifuddin Maarif, Fandi Ahmad Manuaba, Ida Ayu Umadewi Seruti Moh. Sholichin Mohammad Bisri Mohammad Taufiq Muchni Marlikan Mukhlis Arief Irvandi Nafi'a, Futicha Elma Dina NEPRIYANA, Elfita Ni Luh Putri Prabandari Nisa, Reyza Kusvahrun Nuramalia, Rafika Oktafian, Jovan Neriza Permata, Veronika Yulia Pitojo Tri Juwono Prabandari, Ni Luh Putri pratama putra, i wayan ari yoga Pratama, Adit B Putri, Anthea Alviona Rahayu, Kurnia Yuliyanti Reza Adiva Pratama Rini Wahyu Sayekti Riyanto Haribowo Roisa Tri Amini Runi Asmaranto Salsabila, Sumaya Samsuri, Rifka Melania Kusumaningtyas Sari, Chudiana Mega SUMIYATI SUMIYATI Sumiyati Sumiyati Susrama, Fadlil Adya Suyitno Suyitno Swandani, Monique Adriana Taat Setiawan Taat Setiawan, Taat Tri Budi Prayogo, Tri Budi Ussy Andawayanti Vanadani Pranantya Very Dermawan Wahyu Nafier A. Widandi Soetopo Widiyanti, Anisa Tri Yuniar, Frida Rani Yuwono, Hari