In engineering practice, simple methods are important for predicting runoff from watersheds particularly for flood forecasting and water balance calculations. In the present study, it is illustrated that the often-used SCS runoff curve-number approach in its most elementary form can be derived from assuming that only saturated areas contribute to direct runoff.

Computer based programming models are useful analysis tools to understand the watershed planning cum management problem and to find solutions through the best management practices (BMPs) and bio-engineering measures.