Verification and Analysis of Sponge City Design in an Industrial Park in Chongqing Based on the SWMM Model
To evaluate the effectiveness of a typical sponge city design in an industrial park with regards to annual total runoff control rate,runoff peak reduction,and nodal ponding control,this study selected an industrial park in Chongqing as the research area.The SWMM(Storm Water Management Model)was employed to model the sponge city design within this region,and calculations were performed using an improved Horton infiltration model.The research findings indicate that the annual runoff control rate in industrial parks is primarily achieved through source-based LID(Low Impact Development)facilities,with end-of-pipe storage facilities serving as an alternative when source-based solutions are challenging to implement.Peak flow reduction can primarily be achieved through source-based LID facilities during recurrence intervals of P≤1a.It is crucial to design the depression terrain and area reasonably to address local ponding issues that cannot be absorbed by source-based LID facilities.Furthermore,end-of-pipe storage facilities prove to be effective measures in mitigating the impact of continuous rainfall-generated runoff.The verification and analysis aim to explore the sponge performance of source-based LID facilities and end-of-pipe storage facilities in industrial parks when fulfilling different functions,as well as the principles for their optimal combination.This study provides technical references for the design of sponge cities in industrial parks.
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