Developing Citayam Flood Control systems: A Strategic Approach to Minimize Upstream Flooding Impact on Jakarta

Abdurrasyid, Muhamad Luqman (2024) Developing Citayam Flood Control systems: A Strategic Approach to Minimize Upstream Flooding Impact on Jakarta. Diploma thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jakarta terletak di area teluk dan dikelilingi oleh 13 sungai yang melintasi provinsi ini. Sungai Ciliwung merupakan sungai yang sering dilaporkan memiliki kasus luapan banjir terbanyak di Jakarta. Daerah aliran Sungai (DAS) Ciliwung mencakup total area seluas 370,8 km2 dengan panjang sungai utama mencapai 124,1 km dan terbagi menjadi tiga bagian: hulu, tengah, dan hilir, yang mana Jakarta terletak di bagian hilir. Tujuan penelitian ini adalah merancang bendung gerak sebagai struktur tambahan di bagian tengah DAS Ciliwung yang berlokasi di Citayam dengan koordinat 6°27'30.30"LS and 106°48'56.66"BT. Bendung gerak yang direncanakan akan beroperasi sebagai penahan aliran sungai saat terjadi banjir dengan periode ulang 20, 50, dan 100 tahun sebelum air banjir mencapai Jakarta. Analisa hidrolika bendung gerak dilakukan dengan menggunakan software bantu HEC-RAS dan metode trial-and-error untuk menguji dan menyesuaikan penampang sungai, tubuh bendung, dimensi pintu sorong, dan tinggi optimal bukaan pintu air melalui simulasi banjir Q20, Q50, dan Q100. Berdasarkan hasil simulasi dan hitungan, bendung gerak yang direncanakan akan memiliki 3 pintu sorong tipe roller, masing-masing setinggi 7 m dan lebar 10 m (termasuk sponeng), dengan ketinggian stang pengangkat pintu air sebesar 5 m. Tubuh utama bendung gerak memiliki lebar melintang sebesar 79 m dan panjang 10 m. Bendung gerak juga terdiri dari dua pilar, masing-masing setinggi 11 m dan lebar 4 m. Bendung gerak yang dirancang berpotensi dapat mengurangi debit banjir Q100 hingga 1.27% dengan bukaan pintu setinggi 2 m, Q50 sebanyak 0.54%, dan Q20 sebanyak 0.65%. Sebagai hasilnya, bendung gerak dapat mencegah luapan air di atas bendung dan aman dari guling, geser, eksentrisitas, rembesan, turun.
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Jakarta is located in the bay area and surrounded by 13 rivers that cross the province. Ciliwung River has become the main river that frequently reported as the most cases of overflowing river in Jakarta. The Ciliwung Watershed covers a total area of 370.8 km2 with the length of the main river reaching 124.1 km and is divided into three parts, upstream, midstream, and downstream with Jakarta located in the downstream section. The objective of this research is to design a barrage as an additional structure in the midstream of Ciliwung Watershed located in Citayam with the coordinates of 6°27'30.30"S and 106°48'56.66"E. The planned barrage will operate as the river flow retainer during flooding events with a return period of 20, 50, and 100 years before the water reaches Jakarta. Hydraulic analysis of the barrage was performed by using HEC-RAS software and a trial-and-error method to test and adjust the river cross-section, the barrage body, sluice gate dimensions, and the optimal gate opening height through flood simulation for Q20, Q50, and Q100 events. The simulation and calculations indicate that the planned barrage will have 3 roller sluice gates, each 7 m high, 10 m wide (including the sponeng), and the handlebar height of 5 m. The barrage’s main body has a lateral width of 79 m, with a length of 10 m, and includes 2 pillars, each 11 m high and 4 m wide. The designed barrage potentially reduced flood discharge by up to 1.27% with a of 2 m gate opening under Q100, by 0.54% under Q50, and by 0.65% in Q20. As a result, the barrage prevents water from overtopping and is safe from overturning, sliding, eccentricity, piping, and settlement.

Item Type:	Thesis (Diploma)
Uncontrolled Keywords:	Barrage Design, Ciliwung River, Flood Simulation, Gate Opening Bukaan Pintu, Desain Bendung Gerak, Sungai Ciliwung, Simulasi Banjir
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC167 Dams, reservoirs T Technology > TC Hydraulic engineering. Ocean engineering > TC424 Water levels T Technology > TC Hydraulic engineering. Ocean engineering > TC530 Flood control
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Muhamad Luqman Abdurrasyid
Date Deposited:	07 Aug 2024 06:34
Last Modified:	07 Aug 2024 06:34
URI:	http://repository.its.ac.id/id/eprint/109558

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