摘要
通过试验研究了绿地对城市不透水下垫面暴雨径流的削减作用,探讨了不同进水模式(散流式进水、集中式进水)下,不透水下垫面和绿地在实现径流控制目的下的最佳面积比,并对影响径流削减的因素进行了分析。以重庆市为例,在20年一遇暴雨条件下,不透水下垫面与绿地的最佳面积比在散流式与集中式进水模式下分别为5∶1和4∶1,且二者的面积比与绿地的削减效果呈负相关关系;同一面积比下散流式的径流削减效果要好于集中式,实际工程中应将不透水面至绿地之间的径流迁移模式尽可能设计成散流式。
The reduction effect of green space on stormwater runoff from impervious cover was studied experimentally. The optimal area ratios between impervious cover and green space were investiga- ted in different flow patterns （decentralized flow and centralized flow）. The influential factors for runoff reduction were analyzed. Taking Chongqing for example, in the case of 20-year rainstorm, the optimal area ratios between impervious cover and green space in different flow patterns were 5 ： 1 and 4 ： 1, re- spectively. The negative correlation was concluded between the area ratio and the runoff reduction effect. Under the same area ratio, the reduction effect of the decentralized flow pattern was better than that of the centralized flow pattern. Hence, the decentralized flow pattern is the recommended runoff transfer mode between green space and impervious cover in practical projects.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第7期99-102,共4页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2013ZX07312-001-03)
关键词
暴雨径流
绿地
不透水下垫面
削减
stormwater runoff
green space
impervious cover
reduction
