| Summary: | 碩士 === 中原大學 === 土木工程研究所 === 93 === The research applied the concept of Geographic Information System using Digital Terrain Model, the software of GIS and Water Modeling System(WMS) to build distributed hydrological rounting model of the Shihmen Watershed that conform to real situation. In the study, I considered the situation of the real landuse and soil distribution, and used SCS CN value to estimate the rainfall loss. Finally, using the hydrological analysis model of the WMS preceded rainfall-runoff simulation. At first, using SCS dimensionless hydrograph method to estimate the outflow hydrograph of each subbasin and to proceed storage routing of the Zong-Hwa dam in the system. The connection of each subbasin used Muskingum-Cunge Method to proceed river routing, and get the
discharge hydrograph of the whole watershed.
The research collected six typhoons to simulate the distribution of the peak flow and the time of peak flow of the Shihmen Reservoir and compared with observation data. The result appeared that the difference between the simulation and observation data of the inflow hydrograph was similar. The average error of the peak flow was 5.21%, and all of time of peak flow were less than an hour except of Wenny Typhoon delaying 2 hours. So, the model can apply to simulate the rainfall event at
Shihmen watershed.
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