绿化屋面的水文水质特征分析  

Characters of Hydrology and Water Quality of Green Roof

作　　者：王江海[1] 张新波[2] 赵新华[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津城建大学环境与市政工程学院,天津300384

出　　处：《水土保持通报》2014年第3期223-226,共4页Bulletin of Soil and Water Conservation

基　　金：天津市科技创新专项资金项目"生态校园水资源综合利用成套技术示范工程"(08FDZDSF03200)

摘　　要：通过人工搭建绿化屋面装置,重点研究了绿化屋面的径流削减率、产流过程和出水水质3个方面。结果表明,绿化屋面的径流削减率符合一定的阶段性计算公式;绿化屋面产流过程中的径流总量、前期削减量和后期削减量三者与基质层高度呈现不同的线性相关性;绿化屋面能够有效降低雨水中的总氮浓度和COD浓度,但氨氮浓度和总磷浓度有所升高;最后,综合水文和水质两方面,建议绿化屋面基质层高度范围是10—20cm。Green roof is capable of significantly reducing rainwater volume and purifying rainwater quality. It has become one of the important strategies to solve urban floods. This study investigated the ratio of runoff retention, effluent process and effluent water quality by building pilot scale facilities. Results from the experiment confirmed that the ratio of runoff retention is accordance with a certain periodic formula; the total runoff volume, the amount of previous reduction and later reduction have different linear correlations with the thickness of substrate layer; and green roof is capable of significantly reducing the concentrations of TN and COD, but the concentrations of NH4 N and TP in runoff from green roof are higher relatively. Finally, this study recommends that the optimal range of the thickness of substrate layer is 10--20 cm by integrating the two aspects of hydrology and water quality.

关 键 词：绿化屋面 径流削减 产流过程 出水水质 基质层 

分 类 号：P333[天文地球—水文科学] X522[水利工程—水文学及水资源]