绿化屋顶雨水滞蓄能力试验研究  

Experimental study on green roof stormwater retention

作　　者：孙挺[1] 倪广恒[1] 唐莉华[1] 张书函[2] 孔刚[2] 

机构地区：[1]清华大学水利水电工程系,水沙科学与水利水电工程国家重点实验室,北京100084 [2]北京市水利科学研究所,北京100044

出　　处：《水力发电学报》2012年第3期44-48,共5页Journal of Hydroelectric Engineering

基　　金：水利部公益性行业科研专项经费项目(200801108);水沙科学与水利水电工程国家重点实验室课题(2009-TC-1)

摘　　要：屋顶绿化可以配合既有绿地涵养水分,是解决城市雨洪问题的有效策略之一。本文基于绿化屋顶观测试验结果,初步定量研究了北京城市气候下绿化屋顶的雨水滞蓄能力。结果表明:绿化屋顶具有较好的雨水持蓄能力,不同降雨条件下,约有70%的降雨被持蓄;绿化屋顶具有明显的减滞洪峰效果,不同降雨条件下,绿化屋顶均可有效的削减洪峰流量、延滞洪峰到达时间。根据降雨产流过程的观测与分析,归纳出绿化屋顶典型降雨产流模式,即可划分为初期雨水持蓄、快速产流及缓慢释放等3个阶段,并定量分析了各阶段的雨水持蓄特点。Green roof is considered an efficient method for mitigating stormwater due to its water storage and retention capacity.An experiment was conducted to quantify the rainwater retention capacity of a green roof in Beijing.The observation during several natural and artificial rainfalls revealed a good relationship between retention capacity and rainfall amount.The green roof was able to retain roughly 70% of the rainfall and in all the events it resulted in a significant reduction in flood peak.The rainfall-runoff process of green roof can be divided into three stages,i.e.,first retention,rapid runoff,and retention restoration.

关 键 词：水资源 绿化屋顶 城市雨洪 持蓄雨水 减滞洪峰 降雨产流过程 

分 类 号：TV223.5[水利工程—水工结构工程]