低碳生态城区地表雨水管理的综合性指标研究

Study on comprehensive index for the surface rainwater management in low-carbon eco-city

雨水综合利用是低碳生态城区水资源管理的重要方面,有助于解决城市河流行洪压力和径流污染等问题。调研分析了国内绿色建筑雨水管理现状及低碳生态城区建设中已采取的雨水管理措施。以场地综合径流系数作为衡量低碳生态城区雨水管理的控制指标,分析了各类雨水利用措施对场地综合径流系数的影响。根据多年平均降雨量进行全国区域划分,通过计算分析确定了适用于不同区域的低碳生态城区雨水利用措施及对应的场地综合径流系数范围。

Rainwater comprehensive utilization,as an important aspect of water resources management in low-carbon eco-city,contributes to the solution of these issues such as run-off pollution,river flood arising from urban development,and so on.Based on survey,this paper analyzed the status of rainwater management for domestic green buildings and the rainwater management measures adopted in the low-carbon eco-cities.This paper focused on the analysis of impact of rainwater measures on site runoff coefficient which is set as a synthetic parameter for the evaluation of the storm water runoff situation in the eco-city.According to the average annual rainfall,our country was divided into several regions.The rainwater measures and site runoff coefficients suitable for low-carbon eco-city in different regions were calculated and verified.