Abstract
The important flooding drainage phenomenon of the urban regions includes of ground water exchange, sewer water exchange and ground-sewer water exchange. Due to the spread of urban regions development with high economics activities, the distributions and specifications of ditch in urban regions are irregular and un-uniform, equivalent Manhole would be used instead of ditch water exchange and its mechanism to fill ground water and sewer water exchange mode evaluated for urban flooding mode in this study. Sewer’s catchment of Ming-Seng S. Rd 608 Street in Chiayi City as case study applied by SWMM model showing urban flooding phenomenon and the effective drainage mechanism during rainfall similar Typhoon Morakot, thus, providing reliable information and references for engineers.
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