Estimation of erosion rate in Cileungsi upper watershed Bogor Regency

Abstract

Land use of upper watersheds Cileungsi located in Bogor, West Java has always progressed from year to year due to increased human activities that have an impact on land degradation such as erosion. Soil erosion in Java estimated the loss of US $400 million per year. This study aims to estimate of erosion rate by using the Modify Universal Soil Loss Equation (MUSLE) is already integrated into the modeling Soil and Water Assessment Tool (SWAT). SWAT can provide simulation results based on the physical characteristics of the Hydrological Response Unit (HRU) that is considering climate parameters such as rainfall, temperature, solar radiation, humidity, and wind speed. The results showed that the highest rate of erosion on the upstream sub-basin 15 (Ci Janggel) to contribute to the erosion of 184 tons/ha/year classified as heavy erosion. The high rate of erosion occurs on the characteristics of the area with 25-45 % of slope, clay loam soils, land use, and agricultural drylands.