Urban Water Journal ( IF 2.7 ) Pub Date : 2020-09-28 , DOI: 10.1080/1573062x.2020.1823429 Jamie Steis Thorsby 1 , Carol J. Miller 1 , Lara Treemore-Spears 1
ABSTRACT
Increased precipitation, ageing infrastructure, and rising surface water levels have exacerbated stormwater issues in the city of Detroit, causing combined sewer overflows and basement flooding. Green stormwater infrastructure (GSI) is now a requirement of the city as part of its stormwater discharge permit to decrease stormwater system overflows. While GSI has been shown to improve water quality in combined sewer overflows, there has been widely-varying conclusions in flood mitigation potential. This study applied a calibrated EPA Stormwater Management Model (EPA SWMM) to investigate the potential flood mitigation benefits of GSI at a neighborhood scale in the city of Detroit. Results suggest the greatest flood mitigation occurs when locating larger scale GSI (i.e. bioretention basin, bioswale, green roof) in areas that are towards the upstream end of the storm sewer system. However, smaller-scale GSI systems (i.e. rain gardens) were also shown to be effective in flood mitigation in limited cases.
中文翻译:
绿色雨水基础设施在减灾中的作用(美国密歇根州底特律)–案例研究
摘要
底特律市降水增加,基础设施老化和地表水位上升加剧了雨水问题,导致下水道溢出和地下室洪水泛滥。作为城市雨水排放许可证的一部分,绿色雨水基础设施(GSI)现在已成为城市的要求,以减少雨水系统的溢流。虽然已显示GSI可以改善下水道溢流中的水质,但在防洪潜力方面有各种各样的结论。这项研究应用了经过校准的EPA雨水管理模型(EPA SWMM),以研究底特律市附近规模的GSI潜在的防洪效益。结果表明,在定位较大规模的GSI(例如,生物滞留盆地,生物礁,绿色屋顶)位于雨水管道系统上游端的区域。但是,在有限的情况下,较小规模的GSI系统(即雨水花园)也显示出对缓解洪水有效。