Abstract
Proper watershed modeling is one of the most essential parts of watershed management. In this study, the performance of Cidanau watershed runoff models based on the Tank Model was evaluated, in view of the models' applicability to water pollution issues. Watershed division for the application of the Tank Model was examined, and the water movement scheme was taken into consideration. The watershed model was expected to perform as a base model for water quality modeling, following which water quality components will be added to the base model structure.