Tenth International Conference on The Constructed Environment

Abstract

Soil erosion is a major challenge confronting land use and water resources in many parts of the globe and the problem is on the increases in recent time due to population dynamics, changes in the potential climatic and land use over time.This study focused on estimation of soil erosion hazard and sediment yield in Mubi South Watershed, using geospatial technology. The following data were used; soil, rainfall, Advanced Spaceborne Thermal Emission and Reflection Radiometer imagery, sentinel 10m satellite of the year 2016. Factor maps were generated for all the data which served as input layer for both the Revised Universal Soil Loss Equation and Soil Loss Estimator for South Africa model in estimating the soil erosion loss and sediment yield in the study area. The results revealed that 12.55 km2 out of 148.16 km2 area of the watershed of the study area are vulnerable to very severe soil erosion hazard, 13.34 km2 experienced moderate erosion hazard and 97.32 km2 falls within the category of slight soil erosion hazard. It was found that, the magnitude of the soil loss was 4.033 tons/ha/year. Also, the sediment yield was 148.43 tons/ha/year. The sediment delivery ration ranges from 0 (low) to 1 (high), the lower part constitute about 60.0301 KM2 and 88.386 KM2 from the upper part. The research recommends the need for good soil loss management to reduce land degradation, soil loss, and sedimentation within the watershed for planning and implementation of watershed management, degraded land restoration, and better decision making.