Application Of InfoWorks ICM Model In Drainage And Flood Control Planning Of Taizhou City

In recent years,the adverse effects of climate change and urbanization have challenged the prevention and control of urban flooding,and the problem of urban flooding has become increasingly serious,posing a serious threat to socio-economic development and personal safety.While drainage planning is particularly important as the first step in designing a drainage system,traditional drainage planning lacks scientific flooding simulation calculations.Therefore,accurate flooding simulation calculations are needed to provide technical support for urban drainage system planning and design,schemes,etc.In this paper,we use Info Works ICM to analyze the current situation of the drainage system and find the existing problems,and use the simulation of 24h long calendar rainfall for a 30-year event to derive a low-risk area of 229.27 km2,a medium-risk area of 18.35 km~2(7.1%),and a high-risk area of 9.76 km~2(3.8%).Another simulation analysis of the drainage network based on P=1a,P=2a,P=3a,P=5a short calendar rainfall,we get 64.53 km of drainage capacity P<1a,accounting for 10%;302.53 km of drainage capacity 1a<P<2a,accounting for 50%;183.15 km of drainage capacity 2a<P<3a,accounting for 30%.The length of the pipe network with drainage capacity 3a<P<5a is 55.8km,accounting for 9%.The length of the pipe network with drainage capacity P>5a is 8.7 km,accounting for 1%.It was finally concluded that the main reasons for localized flooding were low terrain,insufficient capacity of drainage network,pumping stations and other facilities,and insufficient source runoff control.Based on the results of drainage system capacity assessment,the current drainage network was planned and modified,and the Info Works ICM model software was used to simulate the planned the drainage network.The results showed that after the drainage network planning and modification,the urban road surface was wordy sentences free of water,and the high-risk area of flooding was basically eliminated,which verified the reasonable feasibility of the planning scheme.