| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 91 === This study combined one-dimensional river model and two-dimensional runoff model to simulate surface runoff and channel flow of a reservoir watershed during typhoons. The continuity equations of both runoff and river modules were described by the distributed water-budget. The momentum transfer of water was estimated by the Manning’s equations.
The Shihmen reservoir was selected as the domain of interest. Different spatial resolutions, time step sizes, channel bottom gradients and cross-sections, spatial rainfall distributions were considered for simulations. Results of the current model showed a DEM resolution of 160 m, a time step size of less than 10 second, and average-slope approach of channel bottom gradient, and Thiessen polygons approximation of rainfall can provide a better solution for the Shiehmen watershed.
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