抄録
In this paper, in order to verify the stormwater exchange model between ground surface and sewerage system in integrated urban inundation model, we conducted experiments of urban inundation using a flat basin with a sewer pipe and rainfall supplier, and those results are compared with numerical simulation results. From the comparison between them, it is obvious that stormwater drainage and overflow discharge in urban area can be estimated exactly by using step-down formula and overflow formula in steady flow cases. In unsteady flow cases, however, calculated inundation water depth on the ground surface responses to piezometric head of the sewer pipe too quickly than experimental results, which requires much smaller values of the coefficients in those formula.
