地块级低影响开发技术在历史和气候变化情景下的表现

IF 2.4 3区 环境科学与生态学 Q2 ENGINEERING, CIVIL Journal of Hydro-environment Research Pub Date : 2021-09-01 DOI:10.1016/j.jher.2021.07.004
Albert Z. Jiang, Edward A. McBean
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引用次数: 5

摘要

低影响发展(LID)系统有潜力使城市更具可持续性和韧性,特别是在具有挑战性的气候条件下。为了量化性能,使用PCSWMM在批量水平上描述了一系列盖子组合的建模结果,以检查单个盖子在体积和峰值流量减少方面的性能。在雨桶(RB)、植被洼地(VS)、生物滞留池(BC)和透水路面(PP)这4种植被覆盖物中,地块水平的PP在历史天气条件下减少地表径流量和峰值径流量的能力最好,而BC在减少径流量方面表现出类似的能力,但减少峰值流量的能力最小。以PP作为地块控制方式,2年暴雨径流量最大减少百分比为58%,100年暴雨径流量减少百分比为20%。这些结果意味着百年一遇的风暴可能导致的洪水程度有所减少,但并不能完全消除。有效地,100年的风暴量与LID被下放到洪水相当于25年的风暴。在气候变化情景下,所有LID的表现在不同程度上都有所下降,其中BC是气候变化情景下最具弹性的LID,因此,预测的2年或5年的气候变化风暴的影响将随着LID的存在而减弱,从而导致在历史条件下没有LID的相似数量和峰值。此外,即使在整个社区中分布了大量的井盖,也不会在重大事件中减少大量的洪水,但可以有效地控制小型(特别是2至5年)风暴事件的水量。
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Performance of lot-level low impact development technologies under historical and climate change scenarios

Low impact development (LID) systems have potential to make urban cities more sustainable and resilient, particularly under challenging climate conditions. To quantify performance capabilities, modeling results for an array of combinations of LIDs are described using PCSWMM at lot-level to examine performance of individual LIDs on volume and peak flow reductions. Among the four LIDs studied: rain barrel (RB), vegetative swale (VS), bioretention cell (BC), and permeable pavement (PP), PP at lot-level demonstrated the best capability for reducing surface runoff volumes and peak runoff rates under historical weather conditions, while BC showed similar capability for reduction of runoff volumes but minimal peak flow reduction. With PP as the controlling method at lot-level, the maximum percentage reduction of runoff volume for a 2-year storm is 58% whereas for a 100-year storm, the runoff volume reduction is 20%. These results mean the extent of flooding that may arise from the 100-year storm is reduced, but not eliminated. Effectively, the 100-year storm volumes with LID are devolved to have flooding equivalent to a 25-year storm. Under climate change scenarios, performance for all LIDs declined at various levels, where BC was the most resilient LID for a climate change scenario, such that projected 2-year or 5-year storms with climate change will have its impact devolved with LID in place, to result in similar volumes and peaks without LID under historical conditions. Furthermore, even with an assembly of lot-level LIDs distributed throughout the community, there is not attenuation to substantial degrees of flooding for major events, but there can be effective control for water quantity for small (2- to 5-years in particular) storm events.

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来源期刊
Journal of Hydro-environment Research
Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES
CiteScore
5.80
自引率
0.00%
发文量
34
审稿时长
98 days
期刊介绍: The journal aims to provide an international platform for the dissemination of research and engineering applications related to water and hydraulic problems in the Asia-Pacific region. The journal provides a wide distribution at affordable subscription rate, as well as a rapid reviewing and publication time. The journal particularly encourages papers from young researchers. Papers that require extensive language editing, qualify for editorial assistance with American Journal Experts, a Language Editing Company that Elsevier recommends. Authors submitting to this journal are entitled to a 10% discount.
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