基于SWMM模型的城市化地区雨水桶应用研究

针对城市化地区用地紧张和不透水比例高的特性,基于SWMM模型,模拟了不同比例雨水桶布置在不同设计降雨情境下的区域产流和淹水情况,分析了不同比例雨水桶的应用效果。结果表明,不同比例的雨水桶布置均具有径流和淹水量控制作用,且低重现期降雨情境下雨水桶布置的径流削减和淹水量控制效果明显优于高重现期的降雨情境下的削减效果。雨水桶布置比例的增加对径流系数、峰值流量和淹水量等削减程度增大,对径流系数削减效果更为明显。

Application Research of Rain Barrels in Urbanized Area Based on SWMM Model

Considering the shortage of land for urbanized area and high proportion of impermeable characteristics, SWMM model is used to simulate the use of rain barrels arranged in different proportions in different design rainfall scenarios. The region runoff and overflow situation are analyzed. And then, the application effects of rain barrels with different proportions are analyzed. The results show that different proportion of the rain barrels arrangement all have runoff and overflow controlling effects; the rain barrel arrangement in low return period rainfall situation performed better runoff reduction and overflow control than high return period rainfall scenarios. Increasing the proportion of the rain barrels arrangement increased the reduction degree of runoff coefficient, peak flow and overflow of water. Overall, the effect is more obvious for the reduction of runoff coefficient.