Rainstorm and Waterlogging Process Simulation in Highly Urbanized Areas:Taking Hangzhou City as an Example
Taking three typical highly urbanized areas in Hangzhou City as examples,we constructed a rainstorm and waterlogging model suitable for community scale based on InfoWorks ICM,and verified it by combining historical rainfall and measured waterlogging point data.As the results show:(1)The simulation accuracy of two real rainfall events on November 9,2023 and November 16,2023 are 93.1％and 89.6％respectively,indicating that the simulation accuracy of the model is high;(2)The simulation results of four designed rainfall events with the recurrence period of 5 years,10 years,20 years,and 50 years show that the depth and the area of accumulation water,and the area affected by water accumulation all show an increasing trend with the increase of rainfall.The area with a water depth exceeding 0.40m in the study area increases from 0.02km2 to 0.05km2,and in the areas such as the Labor Road on the east side of West Lake,Zhijiang Road on the west side of Qiantang River,and the south side of the Shangcheng District People's Court,the water accumulation is especially severe.
highly urbanizedland useInfoWorks ICMrainstorm and waterlogginghistorical waterlogging points
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