雨水花园对城镇新建项目区径流控制效果分析

Effect Analysis of Runoff Control in Newly-built Urban Project Area:In Perspective of Rain Garden

以雨水花园渗透滞留措施为代表,结合研究区水文地质条件,利用RECARGA模型对雨水花园的雨水渗透过程进行模拟。结果表明雨水花园对于低重现期降雨径流的削减以及地下水补给等方面具有显著效果,但对于高重现期降雨径流的削减作用不明显。同时比较分析城镇新建项目区在建设雨水花园措施前后的径流系数,探讨城镇新建项目区雨水径流控制措施与对策。

Focusing on the infiltration and retention characteristics of the rain garden,combined with hydrogeological conditions of the research area,the RECARGA model was used to simulate the rainwater infiltration process of the rain garden.The results show that the rain garden has a significant effect on the reduction of rainfall runoff and groundwater recharge in low recurrence period,but with limited effect in high recurrence period.The runoff coefficient before and after the construction of the rain garden in newly built project area in urban is compared and analyzed,and the control measures for rainwater runoff are discussed.