某居住小区水量的SWMM模拟

Simulation of Water Quantity in Residential Area Based on SWMM

以成都市某已建的居住小区为例,运用SWMM模型模拟研究低影响开发措施对水量的控制效果。结果表明,当降雨强度分别为2、5、10年一遇时,洪峰削减百分比分别为75.4%、61.4%、46.2%,径流总量削减率分别为72.5%、58.7%、47.9%,随着降雨强度增大,削减效果逐渐减弱,对低强度降雨的峰现时间有明显的延迟效应,对高强度降雨也能起到较好的雨水迟滞作用。

The control effect of low impact development facilities on the water quantity in a built residential area in Chengdu was simulated using SWMM.The results indicated that when the rainfall intensity was 2、5、10 years storm,the reduction rates of flood peak and runoff were 75.4%、61.4%、46.2% and 72.5%、58.7%、47.9%,which were decreased with the increase of rainfall intensity,for the rainfall with low intensity,the reductioncapability was obvious,for the rainfall with high intensity,it could also play a good role in rainwater retention.