Analisis Sedimentasi dan Operasional Sudetan Kali Ciliwung Ke Kanal Banjir Timur (KBT)

Hidayati, Nurul (2023) Analisis Sedimentasi dan Operasional Sudetan Kali Ciliwung Ke Kanal Banjir Timur (KBT). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sudetan Kali Ciliwung ke Kanal Banjir Timur (KBT) dibangun untuk mengatasi banjir yang terjadi di Jakarta dengan mengalirkan debit Sungai Ciliwung sebesar 60 m³/dt ke Kanal Banjir Timur (KBT) melalui Sungai Cipinang. Pembangunan sudetan yang berada di kawasan hilir Sungai Ciliwung tentunya sangat tinggi potensi sedimentasi yang terjadi membuat kemampuan sudetan dalam mengalirkan debit dari Sungai Ciliwung berkurang. Untuk mengatasi pendangkalan tersebut diperlukan analisa sedimentasi yang terjadi di sudetan sehingga dapat diketahui operasional dan rencana pemeliharaan yang dapat dilakukan. Perhitungan debit banjir menggunakan HSS Nakayasu, Sungai Ciliwung menghasilkan debit banjir rencana pada periode ulang 100 tahun sebesar 506.30 m³/dt dan Sungai Cipinang sebesar 243.53 m³/dt. Debit yang masuk ke dalam sudetan dilakukan dengan permodelan Unsteady flow pada HEC RAS yang menghasilkan debit pengalihan 17.2 m³/dt - 47.84 m³/dt. Pada permodelan sedimen menggunakan persamaan transport function Wilcock-Crowe, sorting method Thomas (Ex5), dan fall felocity Van Rijn berdasarkan hasil kalibrasi RMSE dengan nilai 0.074. Sedimentasi yang terjadi pada sudetan berkisar 145-222 ton dalam 36 jam pengaliran. Dengan butiran yang dominan yaitu butiran lanau berkwarsa dengan diameter 0.0625-0.0325 mm. Diamater sedimen 0.0625 dapat tererosi jika sudetan dilakukan pengaliran yang memiliki kecepatan pengaliran rata-rata 1 m/dt kemudian selanjutnya akan dipompa dengan sludge pump dan dibuang ke disposal area. Operasional sudetan bergantung pada elevasi muka air pada Sungai Ciliwung, Sungai Cipinang, dan Outlet. Sudetan beroperasi apabila muka air Ciliwung berada diatas +10,00 dengan membuka pintu air di inlet kemudian air mengalir menuju outlet dan Sungai Cipinang. Pengoperasian pintu air di outlet bergantung pada elevasi muka air di Sungai Cipinang yaitu apabila lebih rendah dari Outlet maka pintu air akan di operasikan namun apabila lebih tinggi daripada outlet akan ditutup dan pembuangan air yang ada pada outlet akan dioperasikan dengan menggunakan pompa air.
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The Ciliwung River to the East Flood Canal (KBT) Flood Diversion Tunnel was built to overcome flooding that occurred in Jakarta by flowing the Ciliwung River discharge of 60 m³/s to the East Flood Canal (KBT) through the Cipinang River. The construction of the sudetan in the downstream area of the Ciliwung River is certainly very high potential sedimentation that occurs makes the ability of the sudetan in flowing discharge from the Ciliwung River reduced. To overcome the siltation, it is necessary to analyze the sedimentation that occurs in the sudetan so that operational and maintenance plans can be carried out.
Calculation of flood discharge using HSS Nakayasu, Ciliwung River produces a planned flood discharge at a return period of 100 years of 506.30 m³/dt and Cipinang River of 243.53 m³/dt. The discharge into the flood diversion tunnel is modeling with Unsteady flow on HEC RAS which produces a diversion discharge of 17.2 m³/dt - 47.84 m³/dt. In sediment modeling is modeling Quasy Unsteady on HEC RAS using the Wilcock-Crowe transport function equation, sorting method Thomas (Ex5), and fall felocity Van Rijn based on RMSE calibration results with a value of 0.074. Sedimentation that occurs in the flood diversion tunnel ranges from 145-222 tons in 36 hours of flow. With the dominant grains are quartz silt grains with a diameter of 0.0625-0.0325 mm. Sediment diameter 0.0625 can be eroded if the flood diversion tunnel is carried out flowing which has an average flowing speed of 1 m / s then will be pumped with a sludge pump and disposed of to the disposal area. Sudetan operations depend on the water level elevation of the Ciliwung River, Cipinang River, and Outlet. The sudetan operates when the Ciliwung water level is above +10,00 by opening the floodgates at the inlet then the water flows to the outlet and Cipinang River. The operation of the sluice gate at the outlet depends on the water level elevation in the Cipinang River, namely if it is lower than the Outlet, the sluice gate will be operated but if it is higher than the outlet it will be closed and the discharge of water at the outlet will be operated using a water pump

Item Type:	Thesis (Other)
Uncontrolled Keywords:	HEC RAS, Operasional, Sedimen, Sungai Ciliwung, Sungai Cipinang
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Hidayati Nurul
Date Deposited:	06 Sep 2023 06:11
Last Modified:	06 Sep 2023 06:11
URI:	http://repository.its.ac.id/id/eprint/102833

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