CD Skripsi
Analisis Laju Erosi Dan Sedimentasi Pada Bendungan Plta Koto Panjang Kabupaten Kampar
The Koto Panjang hydropower dam is a dam located in the Kampar Watershed (DAS) which originates in West Sumatra and downstream in Riau. Kampar watershed is a place for various human activities such as fisheries, tourism, agriculture, settlements and so on. Changes in land use cause rainwater that should enter the ground to turn into surface runoff. The number of human activities carried out in this watershed causes the potential for erosion and sedimentation to be very high. The soil resulting from land erosion will be carried away by the river flow and then will settle into sediment in the dam. This results in a decrease in the performance of the dam and can reduce the service life of the reservoir. So it is necessary to conduct research related to the estimation of the rate of erosion and sedimentation that occurs in the Kampar watershed. The erosion rate prediction method is calculated using the USLE equation from 2007-2016. The Koto Panjang PLTA Reservoir has a catchment area (DTA) of 3.337,171 km2. The results showed that the largest erosion rate occurred in 2008 which was 546,520 tons/ha/year, and the largest sedimentation rate was 44,265 tons/ha/year with a sediment layer thickness of 3,689 mm/ha/year and a volume of 36,888 m3/ha/ year. While the smallest erosion rate occurred in 2010 which was 142,956 tons/ha/year, and the smallest sedimentation rate was 11,579 tons/ha/year with a sediment layer thickness of 0,965 mm/ha/year and a volume of 9,649 m3/ha/year. The results show that the reservoir will be completely filled with sediment in a period of 73 years. The useful life of the reservoir is reduced from the planned age of the reservoir which has been planned for 100 years, so it is necessary to handle the reservoir so that it continues to operate optimally according to the planned life.
Keywords: watershed, erosion, sedimentation, USLE
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