**3. Results**

The results of this study show that the amount of soil loss in Lake Ol Bolossat catchment ranges between zero (0) and 22, 525.5 tons per year from 57, 800 hectares as shown in **Figure 8**. This implies that the mean annual soil loss is approximately 0.389 tons per hectare per year. However, averaging the soil loss would suggest that the study area is experiencing low soil erosion which is much lower than tolerable levels of 9 ton per hectare [35].

The study revealed that areas covered with dense vegetation i.e. along Ndudori Tumaini escarpment and South Marmanet forest have little or no soil loss while areas with sparse vegetation and Bareland have high soil loss. It is also noted from the study that areas dominated by agricultural activities and areas around the Lake have experienced high soil loss. In addition, barelands and areas with sparse vegetation have high soil erosion rate. Most parts of the study area did not have soil conservation measures as indicated by low value of P factor in **Figure 7** and this could be another possible reason why these areas have high erosion rate.
