Spatial analysis of erosion and land criticality of the upstream citarum watershed

Abstract

High soil sedimentation in the Upstream Citarum Watershed has reduced the capacity of aging Saguling Hydroelectric Power Plant in West Bandung, West Java, a supplier of electricity to Java and Bali. The purpose of this study is to assess the level of erosion danger and land criticality occurring at the Upstream Citarum Watershed to characterize conservation measures to reduce soil and water sediment transfer to reservoirs. To estimate the value of the actual distribution of soil erosion in the river basin, we use the model-based Arc-GIS USLE, which incorporates information on the spatial allocation of each parameter USLE. Cell grid systems available in GIS feature robust functionality; at each grid cell on the map overlay, results can be obtained for the value erosion rate per unit area grid cell, which can then be converted into the speed of erosion per hectare. Simulation results in various fields to control sedimentation caused by erosion in the soil have incorporated the fact that vacant land has been converted into plantations; land adjustment can be simulated with existing spatial planning and the installation of a check dam for sediment control. However, this approach is not optimal to reduce the impact of the age of the reservoirs. To optimize the Upstream Citarum Watershed requires management of various technical and non-technical aspects of the relationships among groups of users and the areas, and of sustainable conservation systems for agriculture.