ABSTRACT
Jatiroto watershed experienced an increase in runoff due to high rainfall intensity, relatively steep land slope conditions, and changes in land use. This problem has the potential to cause disasters, namely floods, landslides, and cold lava floods. The research uses the ArcSWAT (Soil and Water Assessment Tool) to determine the amount of erosion and sedimentation that occurs in the Jatiroto Subwatershed, then maps the distribution of the Erosion Hazard Index so that it can determine conservation directions in accordance with watershed conditions. Based on the results of ArcSWAT 2012 modeling, the amount of erosion was 47,470 tons/ha/year, or 3,955 mm/year, and the existing sedimentation was 29,279 tons/ha/year. The IBE distribution is low criteria at 0%, medium at 39.033%, and high at 60.966%. Conservation efforts based on Land Rehabilitation and Conservation Directions (ARLKT) found that the area's function was 50.89% cultivation, 5.62% protection, and 43.48% buffer. The erosion rate after vegetative conservation efforts were carried out was 29,279 tons/ha/year, or 2,439 mm/year, and sedimentation was 12,701 tons/ha/year. The distribution of IBE after conservation is low (0%), medium (100%), and high (0%). Thus, after vegetative conservation directives, the value of erosion and sedimentation has decreased and has met the permissible requirements.
