Spatial Modeling of Vegetation Cover for Soil Erosion Control Based on Arc GIS and the RUSLE Models

Deforestation in the Serayu watershed, Central Java province, Indonesia for agriculture and other uses leaves only 0.73% of vegetation. It has triggered a number problems such as soil loss (erosion), landslides, floods sedimentation downstream. Environmental damage control needs to be applied through appropriate conservation programs. This study aims understand distribution erosion effectiveness by using vegetation cover. Soil modeling its correlation cover was performed an Arc GIS based model Revised Universal Loss Equation (RUSLE) five scenarios landscape 10%, 15%, 20%, 25%, 30% total area site. Five parameters namely rain erosivity (R), erodibility (K), slope-length (LS) crop management (C) practices (P) factor were used calculate erosion. The results indicated 82.25 tons/ha/year reduction due enhancement from actual condition condition. increase 5% (forest) detracted rate 10,20 tons /ha/year. Very high hazard levels found northern, east, west watershed areasKeywords: erosion, RUSLE model, GIS, Vegetation