Analysis of Erosion Management Based on GeoWEPP Spatial Modeling on Bauxite Mining Activities PT. XYZ in West Borneo

Bauxite ore open-pit mining activities are conducted in spread areas and increase the potential for water pollution, implying a need good management. GeoWEPP is spatial model that predicts erosion magnitude location of sedimentation. This helps management control, including constructing settling pond. Therefore, purpose this study was to examine based on land use, topographic soil maps, as well rainfall temperature data. The results showed 30 hills with total area 13 602.48 Ha obtained sediment 150 186 m3/month amount run off 4 202 267 m3/month. Furthermore, analysis planned block outlet points be used pond construction. optimistic pessimistic cost entire Rp. 222 047 640 944 773 049 768, respectively. Additionally, maintenance at all during operation 3 139 414 818. Planting cover crops ex-mining very effective reducing erosion.