低影响开发技术的雨洪控制效果及水质影响分析——基于SWMM模型

LID Stormwater Control Effect and Water Quality Simulation Based on SWMM

以山东胶州新城区为例,运用SWMM模型模拟对现状、常规开发建设模式以及低影响开发建设模式进行对比,研究不同建设模式的雨洪控制效果和水质变化。结果表明:常规建设模式的径流系数、洪峰流量及有机物排放量较现状都增大;低影响开发建设模式的径流系数、洪峰流量及有机物排放量较现状和常规模式都有所降低;而对于不同低影响开发模式的控制效果,组合LID>透水铺装>雨水花园;降雨强度越大,低影响开发模式有机物排放量的峰值出现越早且越大,控制好初期雨水并进行有效处理成为低影响开发模式的重要研究方向。

In order to study the stormwater control effect and the water quality simulation of different development models in Jiaozhou New District,the SWMM model is used to compare the difference between status,conventional model and low-impact development model（LID）.The results indicate that runoff coefficient,peak flow and organic emissions in the conventional model has increased compared with the status,and the low-impact development mode has decreased with status and conventional model.The stronger the rainfall intensity is,the sooner and greater maximum organic emissions in low-impact development model is.Dealing with the initial rainwater has become an important research direction in low-impact development model.