PENGARUH PERUBAHAN TUTUPAN LAHAN TERHADAP JUMLAH SEDIMENT YIELD DI DAERAH ALIRAN SUNGAI PEUSANGAN, P ROVINSI ACEH

• Main Author: Rosian Alfandi, Nazri
• Format: Final Project
• Language: Indonesia
• Subjects: Karya Umum
• Online Access: https://digilib.itb.ac.id/gdl/view/56821
• Institution: Institut Teknologi Bandung

The watershed is an area above or higher than a river whose topographical boundaries cause water to flow into the same river. the river flow carries sediment particles that potentially cause silting of the estuary area and affect water salinity conditions. The sediment carried by the river flows from the erosion process that occurs in the watershed. Changes in land cover potentially affect the rate of sediment export to rivers due to changes in surface roughness, the rate of water infiltration to the ground, and the hydraulic relationship to the watershed. This study aims to identify the effect of the land cover change on the amount of sediment yield from the Peusangan Watershed, Aceh Province. The amount of sediment yield is calculated from the erosion rate and the sediment delivery ratio. The erosion rate is modeled using the revised universal soil loss equation, while the sediment delivery ratio is calculated based on the function of the watershed area. From the results of the calculation, in general, the rate of erosion is at a very low level where the average erosion rate in 1995 is 26,715 tons/ha/year, in 2005 it is 26,886 tons/ha/year, in 2015 it is 24,959 tons/ha/year and in 2018 amounted to 26,771 tons/ha/year. With a sediment delivery ratio value of 0.180, the total sediment yield was 1.083.148,20 tonnes in 1995, 1.090.047,94 tonnes in 2005, 1.011.920,71 tonnes in 2015, and 1.085.398,35 tonnes in 2018. The results of the identification show that the changes in land cover that affect to amount of sediment yield that comes out from the Peusangan Watershed.