Assessing Hydrological Effects of Bioretention Cells for Urban Stormwater Runoff in Response to Climatic Changes

Assessing Hydrological Effects of Bioretention Cells for Urban Stormwater Runoff in Response to Climatic Changes
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评估生物滞留池对城市雨水径流响应气候变化的水文影响

DOI:
10.3390/w11050997
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发表时间:
2019-05
期刊:
Water (Switzerland)
影响因子:
--
通讯作者:
Tan Soon Keat
Tan Soon Keat
中科院分区:
其他
文献类型:
--
作者:
Wang Mo;Zhang Dongqing;Lou Siwei;Hou Qinghe;Liu Yijie;Cheng Yuning;Qi Jinda;Tan Soon Keat

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利用具有代表性的浓缩途径,对生物滞留细胞(BC)在潜在气候变化下的有效性进行了调查。以广州市为例,研究了气候变化情景下洪峰径流量的变化,在RCP8.5情景下洪峰径流量增长明显,在RCP2.6情景下洪峰径流量略有增长。在不同的设计暴雨中,使用水文模型(SWMM),对多个参数,包括减少径流量,峰值径流,和首次冲洗的BC的性能进行了研究。BC的有效性与规模呈非线性关系。在不同的情况下,它们的业绩下降的幅度不同。在短重现期和短持续时间的风暴中,BCs可以提供足够的响应效果,但随着强风暴的出现,特别是考虑到气候变化,BCs的性能下降。因此,基础设施不能取代灰色基础设施,而应与灰色基础设施相结合。在这项研究中开发的方法可能是有用的,在规划和设计低影响的发展,鉴于未来的气候变化。
An investigation into the effectiveness of bioretention cells (BCs) under potential climatic changes was conducted using representative concentration pathways. A case study of Guangzhou showed changes in peak runoff in climate change scenarios, with obvious growth in RCP8.5 and slight growth in RCP2.6. The performance of BCs on multiple parameters, including reduction of runoff volume, peak runoff, and first flush, were examined in different design storms using a hydrology model (SWMM). The effectiveness of BCs varied non-linearly with scale. Their performance fell by varying amounts in the various scenarios. BCs could provide sufficient effects in response to short-return-period and short-duration storms, but the performance of BCs decreased with heavy storms, especially considering climate change. Hence, BCs cannot replace grey infrastructure but should be integrated with them. The method developed in this study could be useful in the planning and design of low impact development in view of future climate changes.
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