ANALISIS BANGUNAN PENGENDALI SEDIMEN AKIBAT EROSI DAN SEDIMEN PADA DAS CIPUNAGARA MENGGUNAKAN MODEL SWAT

Eka Nur Fitriyana, - (2019) ANALISIS BANGUNAN PENGENDALI SEDIMEN AKIBAT EROSI DAN SEDIMEN PADA DAS CIPUNAGARA MENGGUNAKAN MODEL SWAT. S1 thesis, Universitas Pendidikan Indonesia.

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Abstract

Check Dam merupakan bangunan pengendali sedimen berfungsi untuk mereduksi sedimen di sungai yang berasal dari erosi lahan, dan memperlambat gerakan aliran air sungai sehingga mengurangi degradasi dasar sungai. DAS Cipunagara menjadi salah satu DAS kritis di Indonesia, yang dapat digambarkan dengan besarnya kadar sedimen yang terbawa oleh aliran air sungai, maka dari itu diperlukan studi mengenai analisis bangunan pengendali sedimen akibat erosi dan sedimen sebagai solusi dalam permasalahan tersebut. Penelitian ini bertujuan untuk: (1) mengetahui besar debit air di Sungai Cipunagara; (2) mengetahui tingkat bahaya erosi pada DAS Cipunagara; (3) mengetahui sedimen yang berada pada Sungai Cipunagara; (4) mengetahui bangunan pengendali sedimen yang efisien dan efektif, dan pengaruh pada Sungai Cipunagara. Metode yang digunakan dalam penelitian ini yaitu metode deskriptif kuantitatif. Kalibrasi menggunakan SWAT didapat hasil R2 0,9 (Pengaruh Tinggi) dan NSE 0,9 (Baik). Nilai erosi tertingi tahun 2013 berada di Sub-DAS 18 sebesar 654,402 ton/ha/th dengan kriteria erosi sangat berat, dan yang terendah di Sub-DAS 5 sebesar 1,075 ton/ha/th dengan kriteria erosi sangat ringan. Untuk nilai sedimen tertinggi tahun 2013 berada di Sungai 25 sebesar 1754758.30 ton/th, dan yang terendah di Sungai 7 sebesar 7174.40 ton/th. Tampungan check dam di Sungai 18 sebesar 38344,55 ton dan Sungai 25 sebesar 10349,8 ton. Nilai sedimen, erosi dan debit didapat dari hasil identifikasi, dan evaluasi oleh model Soil and Water Assesment Tools (SWAT). ;--As a sediment control building, Check dam has a function to reduce sedimentation in a river caused by land erosion. it also helps to reduce runoff velocity so river bed degradation automatically can be reduced too. Cipunagara is one of the critical watersheds in Indonesia, that can be described with the amount of sediment that carried away by flowing water. so the study about sediment control building due to erosion and sedimentation is needed as a solution to that problem. This research was aimed to 1) examine the flow rate in Cipunagara river 2) predict erosion danger level at Cipunagara watershed 3) examine the deposited sediment in Cipunagara river, 4) analyze what kind of building which is efficient and effective to control sedimentation in Cipunagara river. The method of this research is quantitative descriptive. the results of calibration is R2=0,9 (significant impact) and NSE=0,9 (good). In 2013, The highest rate of erosion was at sub-basin 13 which is 654,402 tons/ha/year in a very heavy category while the lowest average erosion rate was at sub-basin 5 which is 1,075 tons/ha/year in very light category. The highest value of sediment in 2013 was at river 25 that equals to 1754758,30 tons/year and the lowest one was at river 7 that equals to 717440 tons/year. Check dam capacity at river 18 is 38344,55 tons and river 25 is 10349,8 tons. The rate of sediment, erosion, and flow was obtained from the results of identification and evaluation using Soil water assessment tools (SWAT) model.

Item Type:	Thesis (S1)
Uncontrolled Keywords:	SWAT, DAS Cipunagara, sedimen, check dam, Watershed Cipunagara, Sediment,.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TC Hydraulic engineering. Ocean engineering
Divisions:	Fakultas Pendidikan Teknologi dan Kejuruan > Jurusan Pendidikan Teknik Sipil > Program Studi Teknik Sipil
Depositing User:	Eka Nur Fitriyana
Date Deposited:	28 Jul 2020 08:28
Last Modified:	28 Jul 2020 08:28
URI:	http://repository.upi.edu/id/eprint/41045

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