ANALISA LAJU SEBARAN YIELD SEDIMEN PADA DTA WADUK SAGULING DENGAN MENGGUNAKAN PENDEKATAN USLE-GIS

Abstract

One of the issues that is still a problem in the upstream watershed, including the water catchment area of Saguling Reservoir, is land use change. Changes in land use in water catchment conservation areas into economic, industrial and residential areas, will cause an increase in run-off during the rainy season and sediment transport to the reservoir inlet, while changes in land use downstream of the reservoir will cause an increase in demand. Therefore, research is needed to determine the rate of increase in sediment yield that occurs in the watershed of the Saguling Reservoir. The integration of USLE and GIS allows us to determine the spatial distribution of parameters. Each factor in USLE is calculated using the existing facilities in the GIS software. The results showed that there was an increasing rate of sediment yield in the "Very Heavy" TBE category, while in the"Medium" TBE category the trend of sediment yields showed a downward trend.