Assessment of sponge city scheme in a hillside area based on SWMM model
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Abstract:
A hillside residential area in Jinan city is selected to study the main road of "road flood discharge"which is generalized as an irregular open channel, and the influence of sponge city reconstruction scheme on design rainfall hydrological process in different return periods based on the SWMM(stom water management model) model.The results show that: the SWMM model can be used to simulate the process of "flooding on road"in the hillside area, and the rainfalt-runoff process can be effectively ont rolled by the select ed modificat ion scheme(low impact development and drainage system reconstruction); for different return periods(1 year,3 years, and 5 years)w ithin 5 years,the redution rates of total runoff and peak flood discharge from Out01 and Out 02 are over 20% and 10%, respect ively, the peak water level reduction rate at Out 01 is greater than 15%, which significantly reduces the impact of the "road flood"disast er in the study area.This study can provide a theoretical basis and significant reference for the simulation of "flooding on road"and the construction and management of sponge cit ies in the hillside area.
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