摘要：The problems of flooding and pollution caused by urban stormwater runoff have become increasingly prominent in recent years.It is widely generally accepted that the expansion of urban construction land area (UCLA) and the increase in impervious rate (IR) have an impact on ecological problems,but the extent of the impact is sufficiently unclear.Consequently,based on the hydrological,hydrodynamic,water quality,pollutant build-up,and wash-off models in the storm water management model (SWMM),this paper theoretically explored the mechanism and extent of the influence of different UCLA and IR on the urban stormwater runoff and pollution.The results show that the variation of stormwater runoff and pollution is closely related to UCLA and IR.In the case of the inevitable increase of UCLA,it is essential to improve the permeability.There is a critical value of the influence of UCLA on stormwater runoff and IR on stormwater runoff pollution.The critical value is not a fixed value but changes with the rainfall intensity changing.Rainfall intensity plays an essential role in the process of urban stormwater runoff and pollution process.
关键词：Urban construction land area;Impervious rate;SWMM;Urban runoff;Pollution;Event mean concentration
