摘要
在暴雨或较大降雨强度的条件下城市绿地也会产生地面径流,在建设公园绿地的同时要考虑对公园绿地上雨水径流的收集,并回用于绿地灌溉,而不是简单排入城市排水系统。结合北京市丰台区绿源公园绿地径流的现场试验观测,提出了城市草坪绿地降雨量、降雨强度与径流量的关系,以及不同地面坡度条件下的降雨径流关系,为北京城市绿地雨水径流利用提供了基本依据和基础参数。试验结果表明,降雨量小于9mm时试验坡度的草坪绿地均不产流;次降雨量大于9mm时,绿地的径流效率与次降雨量成正比,而坡地上二者的相关性比平地更加显著。
There will be surface runoff on urbon green spoce under the conditions of heavy ruin or greater roinfoll inlensity. The collection of rainwater runoff should be considered in the construction of park green space, and the water should be reused for green space imigation rather than simple discharge to city drainage system Based an the on-site tests and observation of the green spoce runoff of Luyuan Park in Fengtai District of Beijing ,the relationship among the rainfalt,rain intensity and runoff volume of urban turf green space and in the conditions of different ground slope are pul forward, which provides basic foundation and paramelers for the utilization of rainwaler runoff on the city green space ef Beijing The experimental results show that there is no runoff on test slops of any declivities with rainfall less than 9mm. and the runoff efficiency and rainfall are in direct proportion wJlh rainfall larger than 9mm, which is more obvious an slope than an fiat land.
出处
《中国园林》
2008年第11期61-65,共5页
Chinese Landscape Architecture
基金
国家自然科学基金项目"城市绿地质量水分生产函数模型及应用"(编号50679002)资助
关键词
风景园林
公园绿地
雨水收集
径流效率
landscape archilecture
park green space
rainwater callection
runoff efficiency
