Abstract
Recently, water cycle model has been applied widely and expected to be a simulation tool for conserving appropriate water cycle, and for flood control. In this paper, a new water cycle model (WCAP: Water Cycle Analysis Program) aimed to simulate not only short-term runoff but also long-term runoff was developed. A quasi-three dimensional model was adopted for flow smulation. This model divides watershed areas into optional triangular grids, which improves the accuracy of groundwater and saturation surfaceflow simulation. This model was applied to simulate water cycle of upstream area of the Kano river. Both short-term runoff and long-term runoff was simulated with satisfactory accuracy so that the validity of new model was confirmed.
