Erosion control at Karai Sub Watershed

Karai Sub watershed was part of Ular Watershed that reported land use changed nowadays. This condition risk to this watershed health condition especially for erosion. This study aims to calculating erosion in existing condition then determine the erosion control scenario based on land use change scenario. This study is conducted by calculate the erosion value by USLE Method using Geographic Information System (GIS). The scenarios of land use change simulation determined by change the production and shrub land use into forest land use for several varying scenario by increasing the existing forest to ten percent higher at scenario 1 and twenty percent higher at scenario 2. The best rational scenario in reducing erosion will be chosen as erosion control at Karai Sub Watershed. The result of study shown the erosion value at existing condition is 220.02 ton/ha/yr and classified as high level hazard. The best scenario is in controlling erosion and sedimentation condition was the second scenario by increasing the forest land use up to forty percent that reduce erosion in to 148.27 and classified as medium hazard level.