Simulation of regulation effect of permeable pavement on hydrology and water quality of rainfall runoff
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Abstract:
Taking the sponge city demonstration project in Yixing city as the research object, we used SWMM software to generalize and model the study area and validated the fidelities of the model with actual monitoring data. The model was used to simulate the hydrology and water quality changes in the area at the rainfall intensity of the return period of 3, 5, 10, 15, 50, 100 years, and to analyze the regulation effect of permeable pavement on the ecosystem of city rainwater. The results showed the permeable pavement could reduce rainfall runoff by up to 19.74% and the runoff coefficient decreased by 21.93% . The overall runoff reduction effect increased along with the rainfall intensity, but the increase was small. As to conventional pollutants of SS, COD, TN, and TP, the reduction was up to 24.12% , 23.79% , 22.81% , and 21.90% , respectively. The permeable pavement could also delay the peak time of runoff volume and pollutant load concentration. This study presents a scientific evaluation on the effect of permeable pavement and provides reference for engineering design.
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