The available data were stored in the raster-based GIS system implemented in IDRISI consisting of the following maps:
1. Actual and potential erosion maps (Machado et al., 1996; Eweg et al., 1998)
2. Land cover-land use map (Egziabher et al., 1998)
3. Roads and trails map
4. Rivers, streams, lakes and wetlands map.