The capacity of greening roof to reduce stormwater runoff and pollution

摘要: To examine the stormwater retention capacity and runoff water quality of a green roof in Chongqing, China, 19 rainfall event samples dry wet deposition were measured. The results showed that effectively retained runoff, with ranging from 35.5% to 100%, an average 77.2%. annual volume rate reached 758.7 mm 68.0%, respectively. When we compared stromwater among roof, asphalt (control) samples, found reduced concentration TSS, could neutralize pH rainfall; however, it increased concentrations TN, NH4+-N, NO3--N, TOC, COD, BOD5, F-, Cl-, SO42-, K+, Ca2+, Si4+, DPb, DAl, DMn, DFe. pollutant loads was sink for but sources TOC DAl. Overall, effective reducing neutralizing acid abating loading most pollutants; seriously affected by soil substrate. Therefore, suggest roofs need be constructed suitable materials order avoid deterioration quality. (C) 2015 Elsevier B.V. All rights reserved.