Samenvatting

Soil erosion and reservoir sedimentation is a serious problem in semi-arid regions like the Gourma region in Burkina Faso. The newly created water agency AEG in Gourma is responsible for the management of water reservoirs in the region. The young water agency is still defining its course and suitable monitoring and management plans for the area. The Tandjari reservoir is used for the drinking water supply of the nearby capital of the region Fada N’gourma. As the monitoring of the reservoir is in development, not much data is present yet. This study focused on the quantification of soil erosion in the reservoir catchment basin, and the resulting reservoir sedimentation and effect on the storage capacity. The Universal Soil Loss Equation (USLE) is used to estimate the amount of erosion on catchment scale.