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LID-SWM Practices as a Means of Resilience to Climate Change and Its Effects on Groundwater Recharge

机译:LID-SWM实践作为抵御气候变化的手段及其对地下水补给的影响

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Many surface water bodies have been severely degraded by runoff from the centuriesof continuous human development without regard to the impacts of stormwater. Localgovernments are beginning to responsibly respond to the need for action aboutincreased imperviousness by adopting local Low Impact Development (LID)ordinances. The purpose of this study was to evaluate the hydrologic abilities of LIDdevelopment to: reduce peak runoff flow rates to the pre-development values; toinfiltrate the recharge volumes mandated by current criteria; and to attenuate theimpacts of extreme storm events. A numerical simulation was performed on a 4-hectare site for pre-development as well as residential development withConventional and LID stormwater management design scenarios. Research resultsfrom four years of intense monitoring of LID systems at the University of NewHampshire Stormwater Center were integrated into these hydrologic models.Analyses were performed for hydrologic soil types A and C, for storms withrecurrence intervals of 0.17-, 2-, 10-, and 100-years, as well as 2-, 10-, and 100-yearsadjusted for climate change. The results show that the LID site design: generatedmuch lower runoff volumes than the Conventional and Pre-development siteconditions; infiltrated more than the recharge volumes required by currentregulations; and attenuated the impacts of extreme storms modified for climatechange.
机译:几个世纪以来,许多地表水体由于径流而严重退化。 不考虑雨水影响的人类持续发展。当地的 政府开始以负责任的态度回应有关 通过采用本地低影响开发(LID)增加不渗透性 条例。这项研究的目的是评估LID的水文能力 开发以:将高峰径流量降低到开发前的值;到 渗入当前标准规定的补给量;并减弱 极端风暴事件的影响。在4-上进行了数值模拟 公顷的预开发和住宅开发用地 常规和LID雨水管理设计方案。研究成果 来自新大学对LID系统进行的四年严格监控 新罕布什尔州暴雨中心已集成到这些水文模型中。 针对A和C型水文土壤,针对暴风雨进行了分析。 复发间隔为0.17年,2年,10年和100年,以及2年,10年和100年 针对气候变化进行了调整。结果表明,LID网站的设计:生成 径流量比常规和预开发区低得多 情况;渗透量超过当前所需的补给量 规定;并减弱了针对气候变化的极端风暴的影响 改变。

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