Geographic information system (GIS) based soil loss estimation using RUSLE model for soil and water conservation planning in anka_shashara watershed, southern Ethiopia

Water induced soil erosion has been continued to threaten the land resources in sub humid northwestern highlands of Ethiopia. Human-induced cover (LC) changes due improper management practices are contributing factors deteriorating quality. Soil and water conservation measures have implemented without site-specific scientifically quantified data priority bases this regard; study was conducted with a view quantifying Anka-Shashara watershed. To do this, we opted use RUSLE model based on geographic information systems. By collecting rainfall, soils, vegetation, slopes separately as layer determining pixel values for each these factors, assessment basin is obtained. The result reveals that mean annual loss (15.22t/ha/yr) most parts area falls tolerable levels almost 66% (1594 ha), moderate level about 23% 10% at high watershed classified four main classes. None Slight rates (0-10t/ha) rate seen from distribution map. upstream catchment needs protection those existing fundamental attention SWC recommended bases. Therefore, reduce sedimentation problem ensue sustainability need special implementing intervention earlier.