基于SWMM情境模拟的沿海浅山区低影响的适宜性技术与集成优化研究——以惠州市为例

Suitabe Technique and Integrated Research of Low Impact Development in Coastal Hilly Area Based on SWMM:A Case Study of Huizhou

沿海浅山区由于其特殊的条件类型在城市化过程中会存在与平原城市不一样的雨洪问题。以惠州市惠东县稔山镇亚婆角某小区为研究区域,依据其规划方案,建立SWMM模型,模拟不同降雨事件中8种情境下的径流控制效果,分析在一定的区域内采用绿色雨水设施代替灰色雨水管网的可行性,以及单独布设透水铺装、绿色屋顶、下凹式绿地、雨水花园、生态滞留池和低影响开发组合设施对径流的削减效果。结果表明:在50年降雨重现期范围内,通过植草沟等绿色雨水设施完成雨水传输是可行的,并且比灰色雨水管网控制效果更优。

Due to its special types,the coastal hilly areas will encounter storm water management problems which are different from the plain cities in the process of urbanization.In the present study of a community in Yapojiao,Renshan Town of Huidong County in Huizhou,a SWMM model is developed on the basis of its planning,and the storm water control effects of eight planning schemes for different rainfall events are simulated.We explore the feasibility of adopting a green storm water infrastructure in replacement of a rainwater pipe network in a certain area,and analyze the control different schemes-separate permeable paving,green roof,depressed green,rainwater garden,bio-retention facility,and combined low-impact development measures.The results indicate that it is feasible for the green storm water infrastructure to complete rainwater transmission through vegetative swale,etc,within the range of the rain return period of 50 years,and the control effect is better than the gray storm water infrastructure.