SWAT model is a semi-distributed, physics based water shed model. The model is now being applied/customized in Tanzania, the successful stories on SWAT applications motivated the study, unfortunately, and the model is developed from multitudes of parameters, hence complex. It’s also data expensive. Modeling uncertainty is high if not applied with caution. Unfortunately, SWAT model applications techniques have Not been adequately documented. Little has been done by other works to compare SWAT stimulations performance with data from intensive sediment sampling programme. Therefore this study used SWAT model in larger and complex catchment in order to estimate sediment yield and document application techniques and give insight to possible model customization opportunities.