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The development of roadside green swales in the Chinese Sponge City Program:Challenges and opportunities

查看全文 作　　者：Lingwen [1,2,3]Lu;Faith Ka Shun [1,4]Chan;Matthew [5]Johnson;Fangfang [6]Zhu;Yaoyang [7]Xu 高影响力作者 机构地区：[1]Key Laboratory of Urban Environment and Health,Ningbo Observation and Research Station,Institute of Urban Environment,Chinese Academy of Sciences(CAS),Xiamen,361021,China;[2]School of Geographical Sciences,Faculty of Science and Engineering,University of Nottingham Ningbo China,Ningbo,315100,China;[3]CAS Haixi Industrial Technology Innovation Center in Beilun,Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control,Ningbo,315830,China;[4]Water@Leeds Research Institute,University of Leeds,Leeds LS29JT,UK;[5]School of Geography,University of Nottingham,Nottinghamshire,NG72RD,UK;[6]Department of Civil Engineering,Faculty of Science and Engineering,University of Nottingham Ningbo China,Ningbo 315100,China;[7]Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control,CAS Haixi Industrial Technology Innovation Center in Beilun,Ningbo 315830,China高影响力机构 出　　处：《Frontiers of Engineering Management》索引2023年第10卷第4期,共16页高影响力期刊 基　　金：the National Key R&D Program of China(Grant Nos.2021YFE0193100 and 2019YFC1510400);the Construction Project of China Knowledge Centre for Engineering Sciences and Technology(Grant No.CKCEST-2022-1-41);the National Natural Science Foundation Program of China(Grant No.NSFC41850410497);the Institute of Asia Pacific Studies(IAPS)research funds and the Doctoral Training Partnership and the postgraduate research fund at University Nottingham Ningbo China and the Institute of Urban Environment,Chinese Academy of Sciences. 摘　　要：Roadside green swales have emerged as popular stormwater management infrastructure in urban areas,serving to mitigate stormwater pollution and reduce urban surface water discharge.However,there is a limited understanding of the various types,structures,and functions of swales,as well as the potential challenges they may face in the future.In recent years,China has witnessed a surge in the adoption of roadside green swales,especially as part of the prestigious Sponge City Program(SCP).These green swales play a crucial role in controlling stormwater pollution and conserving urban water resources by effectively removing runoff pollutants,including suspended solids,nitrogen,and phosphorus.This review critically examines recent research findings,identifies key knowledge gaps,and presents future recommendations for designing green swales for effective stormwater management,with a particular emphasis on ongoing major Chinese infrastructure projects.Despite the growing global interest in bioswales and their significance in urban development,China's current classification of such features lacks a clear definition or specific consideration of bioswales.Furthermore,policymakers have often underestimated the adverse environmental effects of road networks,as reflected in existing laws and planning documents.This review argues that the construction and maintenance of roadside green swales should be primarily based on three critical factors:Wellthought-out road planning,suitable construction conditions,and sustainable long-term funding.The integration of quantitative environmental standards into road planning is essential to effectively address the challenge of pollution from rainfall runoff.To combat pollution associated with roads,a comprehensive assessment of potential pollution loadings should be carried out,guiding the appropriate design and construction of green swales,with a particular focus on addressing the phenomenon of first flush.One of the major challenges faced in sustaining funds for ongoing maintenance after swale construction.To address this issue,the implementation of a green finance platform is proposed.Such a platform would help ensure the availability of funds for continuous maintenance,thus maximizing the long-term effectiveness of green swales in stormwater management.Ultimately,the findings of this review aim to assist municipal governments in enhancing and implementing future urban road designs and SCP developments,incorporating effective green swale strategies. 关 键 词：grass swale infiltration swale bioswale wet swale spongecity
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