中文摘要：

研究设计了4种屋顶：沥青屋顶、基质屋顶、草坪屋顶和模块屋顶。将种植了绿色植物的草坪屋顶和模块屋顶称为绿色屋顶，并对各屋面径流的水质进行了监测。结果表明，以沥青屋顶为对照，草坪屋顶能消减暴雨径流量50％左右。基质屋顶、草坪屋顶和模块屋顶的屋面径流中NHrN、PO4^2-P和TP浓度较沥青层顶低，而NO3-N和TN浓度较高。污染物输出负荷中，除TN、NO3-N外其余污染物都有所削减，其中绿色屋顶对NH3-N、TP、TDP和PO43-P负荷的去除率分别达到75．35％、65．16％、83．02％和94．77％。草坪屋顶和模块屋顶径流中磷素主要以颗粒态存在，其颗粒态磷占总磷的88．95％和74．7％，而氮素主要以溶解态形式存在，颗粒态氮占总氮的26．88％和1．61％。

英文摘要：

4 types of roofs such as asphalt roof, matrix root, lawn roof and module roof were constructed and the water quality of roof runoff was monitored. The lawn roof and module roof with plants are called green roofs. Results showed that lawn roof can reduce runoff about 50% compared with asphalt roof. The concentrations of NH3-N, PO4^3- and TP in runoff from the matrix roof, lawn roof and module roof are lower than those of the asphalt roof while the concentrations of NO3-N and TN are higher. Output loads of many pollutants in the roof runoff have also decreased except TN, NO3-N, with removal rates of output loads for NH3-N, TP, TDP and PO43-P in green roof as 75.35%, 65.16%, 83.02% and 94.77% respectively, compared with those of asphalt roof. The particle-form of phosphorus is dominant in both lawn roof and module roof runoff with the proportion of 88.95% and 74.7% respectively. However, nitrogen is mainly in dissolved form and particle-form nitrogen accounts for only 26.88% and 1.61% of TN in the above two roofs runoff respectively.