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Citra Indriyati
Sriwijaya University
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Materials Science & Nanotechnology Physics

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Evaluating the Technical Feasibility of Retention Basins for Flood Control in Palembang City Febrinasti Alia; Muhammad Baitullah Al Amin; Bimo Brata Aditya; Citra Indriyati
Science and Technology Indonesia Vol. 4 No. 2 (2019): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2199.524 KB) | DOI: 10.26554/sti.2019.4.2.40-51

Abstract

Flood control is one of the prevention methods which involves various engineering sciences and is unique. One of structural flood control methods is retention basin with the goal of containing a certain storm event flow volume and obtaining a specific peak flow reduction. This paper’s objective is to describe how to assess the performance of retention basin physical components quantitatively on seven retention basins in Palembang City. The reference and the parameter used in this research are referred to Drainage Systems Assessment Design (Vadlon, 2011) that is based on Standard Procedure of Retention Basins and Polders Construction according to Public Works Ministry of Cipta Karya Directorate General and the Regulation of Public Work Ministry No.32/PRT/M/2007. The result of the assessment is that there are three retention basins which are in good condition, namely Kambang Iwak Besak (63,9%), Simpang Polda (60,34%), and Kambang Iwak Kecil (56,8%); meanwhile the other four basins are in bad conditions, namely RS. Siti Khodijah (43,01%), Palembang Icon (41,93%), Kemang Manis (7,03%), and Brimob (0,94%). Therefore, the assessment of the retention basins towards its effectiveness on flood controlling and handling priority level is done by hydraulic modeling simulations and GIS. 4. Based on the inundation priority assessment of simulated flood depth and duration, it can be inferred that the retention basin of Kambang Iwak Besak, Kambang Iwak Kecik, Palembang Icon, RS Siti Khodijah, and Kemang Manis have low priority handling level. Meanwhile, Brimob and Simpang Polda retention basins have high priority handling level.
Desain dan Perencanaan Teknis Kolam Retensi Arafuru Kota Palembang Febrinasti Alia; Citra Indriyati; Bimo Brata Aditya
TERAS JURNAL : Jurnal Teknik Sipil Vol 13, No 2 (2023): Volume 13 Nomor 2, September 2023
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v13i2.876

Abstract

Abstrak Pembangunan kolam retensi Arafuru belum mampu mengurangi frekuensi terjadinya banjir secara optimal karena Jalan Arafuru masih termasuk dalam lokasi titik banjir yang terdapat pada DAS Buah dengan ketinggian banjir antara 50-100 cm dengan durasi 24 jam. Kolam tambahan yang akan dibangun direncanakan seluas 5950 m2 untuk menampung kelebihan kapasitas kolam retensi eksisting. Optimalisasi kapasitas tampung kolam retensi Arafuru dapat dilakukan dengan mengkoneksikan outlet kolam retensi eksisting dengan inlet kolam retensi baru yang memiliki luasan 5950 m2 dengan kedalaman minimal 3 m untuk memenuhi daerah layanan/catchment area dengan luasan ±96,17 Ha. Pendugaan debit puncak limpasan permukaan dilakukan dengan metode SCS-CN dan didapatkan tinggi elevasi muka air maksimum inflow sebesar 11,4 m3/s terjadi pada menit ke 60, sedangkan elevasi puncak yaitu 2,7 m. Simulasi reduksi debit banjir dilakukan dengan software HEC-HMS, didapatkan bahwa penambahan kolam retensi dapat mengurangi debit inflow puncak dari 11,4 m3/s menjadi 7,1 m3/s atau sebesar 37,72%. Kata Kunci: Kolam retensi, analisa hidrologi, analisa spasial, pengendalian banjir  Abstract The construction of Arafuru retention basin has not been able to optimally reduce the frequency of flooding since Jalan Arafuru district is still included as one of the flood points within Buah Watershed with flood depths between 50-100 cm and duration of 24 hours. The additional basin is designed to be 5950 m2 in accordance with the area of land that has been acquired to accommodate the over capacity of the existing retention basin. The optimization of Arafuru retention basin’s capacity can be done by connecting outlet from existing basin to the inlet of the new basin. Retention basin of 5950 m2 with a minimum depth of 3 meters is expected to accommodate runoff from ± 96,17 ha catchment area. The estimation of the peak runoff discharge was carried out using the SCS-CN method and the maximum inflow water level elevation was 11,4 m3 / s occurring in the 60th minute, while the peak elevation was 2,7 m. The simulation of flood discharge reduction using HEC-HMS resulted that the addition of a retention basin could reduce the peak inflow from 11,4 m3 / s to 7,1 m3 / s or as much as 37,72%. Keywords: retention basin, hydrological analyses, spatial analyses, flood control
Co-Authors Adhityia, Bimo Brata Alia, Febrinasti M. Baitullah Al Amin, M. Baitullah