Analisis Sedimentasi Waduk Wlingi Di Kabupaten Blitar

Hamiidah, Tsaabitah 'Azzah (2026) Analisis Sedimentasi Waduk Wlingi Di Kabupaten Blitar. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sedimentasi adalah permasalahan utama yang sering terjadi di waduk di Indonesia, termasuk di Waduk Wlingi. Studi ini bertujuan untuk menganalisis laju sedimentasi dengan mengetahui volume sedimen yang masuk ke dalam waduk dimana saat terjadi penumpukan sedimen akan dilakukan perencanaan penangangan terhadap sedimentasi. Analisis laju sedimentasi menggunakan metode USLE yang mempertimbangkan kondisi daerah tangkapan waduk dan menggunakan metode angkutan sedimen englund-hansen yang mempertimbangkan kondisi bentuk sedimen yang mengalir menuju waduk, sedangkan analisis hidrologi dilakukan dengan pendekatan HEC-HMS dan Hidrograf Satuan Sintetik Nakayasu. Nilai sedimentasi akan di evaluasi dengan kebutuhan waduk outflow dan data teknis tampungan mati waduk. Hasil penelitian menunjukkan bahwa kondisi daerah tangkapan air Waduk Wlingi secara umum masih tergolong relatif baik, dengan dominasi kelas erosi sangat ringan sebesar 55,76% dan erosi ringan sebesar 43,96%, serta hanya 0,28% wilayah yang termasuk kelas erosi sedang. Meskipun demikian, dengan luas daearah tangkapan air sekitar ±74.968 hektar, akumulasi erosi skala kecil tetap berkontribusi terhadap suplai sedimen ke waduk dalam jangka panjang. Hasil analisis USLE menunjukkan bahwa laju sedimentasi tahunan Waduk Wlingi berkisar antara 36.930–52.136 m³/tahun, dengan ketebalan sedimen sekitar 0,049–0,070 mm/tahun. Sedimentasi ini tergolong sedang dan bersifat akumulatif. Dalam periode sekitar lima tahun, sedimen yang terakumulasi diperkirakan mencapai 200.000–260.000 m³ sehingga berpotensi menurunkan volume tampungan efektif. Penanganan sedimentasi yang direkomendasikan adalah pengerukan berkala (dredging) setiap lima tahun dengan target volume sekitar 250.000 m³, yang perlu dikombinasikan dengan pengelolaan dan konservasi DTA secara berkelanjutan dengan menggunakan cutter suction dredger berdasarkan kefektifan dan tidak mengganggu pemanfaatan waduk. Diharapkan hasil analisis ini memberikan rekomendasi untuk mengatasi sedimentasi yang terjadi pada Waduk Wlingi di Blitar.
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Sedimentation is a major problem that often occurs in reservoirs in Indonesia, including the Wlingi Reservoir. This study aims to analyze the sedimentation rate by determining the volume of sediment entering the reservoir, where sediment accumulation will be addressed through sedimentation management planning. The sedimentation rate analysis uses the USLE method, which considers the conditions of the reservoir catchment area, and the Englund-Hansen sediment transport method, which considers the conditions of the sediment flowing into the reservoir. Meanwhile, the hydrological analysis is conducted using the HEC-HMS approach and Nakayasu's Synthetic Unit Hydrograph. Sedimentation values will be evaluated based on the reservoir's outflow requirements and technical data on the reservoir's dead storage. The results of the study show that the conditions of the Wlingi Reservoir catchment area are generally still relatively good, with a dominance of very light erosion (55.76%) and light erosion (43.96%), and only 0.28% of the area classified as moderate erosion. However, with a catchment area of approximately ±74,968 ha, small-scale erosion accumulation still contributes to sediment supply to the reservoir in the long term. The results of the USLE analysis show that the annual sedimentation rate of the Wlingi Reservoir ranges from 36,930 to 52,136 m³/year, with a sediment thickness of approximately 0.049 to 0.070 mm/year.This sedimentation is classified as moderate and cumulative. Over a period of approximately five years, the accumulated sediment is estimated to reach 200,000–260,000 m³, which has the potential to reduce the effective storage volume. The recommended sedimentation management is periodic dredging every five years with a target volume of around 250,000 m³, which needs to be combined with sustainable DTA management and conservation using a cutter suction dredger based on effectiveness and without disrupting the utilization of the reservoir. It is hoped that the results of this analysis will provide recommendations for addressing sedimentation occurring at the Wlingi Reservoir in Blitar.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Soil Erosion, Sedimentation, Dredging, Flushing, Resevoir, Erosi Lahan, Sedimentasi, Pengerukan, Penggelontoran, Waduk
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TC Hydraulic engineering. Ocean engineering > TC167 Dams, reservoirs T Technology > TC Hydraulic engineering. Ocean engineering > TC175.2 Sediment transport T Technology > TC Hydraulic engineering. Ocean engineering > TC187 Dredging
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Tsaabitah 'azzah Hamiidah
Date Deposited:	23 Jan 2026 10:20
Last Modified:	23 Jan 2026 10:20
URI:	http://repository.its.ac.id/id/eprint/130281

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