Analisis Kemiringan Lereng Daerah Aliran Sungai Kampar Dengan Titik Keluaran Waduk Plta Koto Panjang

Abstract

The upstream watershed has a very important role in flowing water to the downstream area. Upstream watersheds located in highlands usually have very steep slopes with slopes of more than 15%. This causes the potential for erosion in the upstream to be large. The potential for erosion will be even greater because the steep slope causes a large amount of transport energy for water. Gravity will be greater with the slope of the slope. The purpose of this study is to classify and create a slope map of the Koto Panjang hydropower reservoir watershed. The method used in this research was data analysis with geographic information system software. The level of slope in the Kampar watershed varied greatly from flat (0-8%), gentle (8-15%), steep (15-25%), steep (25-45%), and very steep (>45%). Meanwhile, the Koto Panjang PLTA Reservoir watershed had a slightly steep slope (15-25%) covering an area of 104.465 km2, steep (25-45%) covering an area of 484.893 km2, and very steep (>45%) covering an area of 2747.813 km2. Based on the slope level in the Koto Panjang PLTA Reservoir watershed, the LS value in the watershed is 8.907.
Keywords : watershed, erosion, slope