Restoring a stream through retention of urban stormwater runoff: a catchment-scale experiment in a social–ecological system
Restoring a stream through retention of urban stormwater runoff: a catchment-scale experiment in a social–ecological system
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通过保留城市雨水径流来恢复河流：社会生态系统中的流域规模实验
DOI：
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发表时间：
2015
影响因子：
1.8
通讯作者：
Samantha J. Imberger
中科院分区：
文献类型：
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作者：
C. J. Walsh;T. Fletcher;D. Bos;Samantha J. Imberger
城市河流生态结构和功能的恢复可能需要流域尺度的排水基础设施改造，但这种流域尺度的恢复尝试及其评估是罕见的。它们要求流生态学家接受研究城市集水区的社会生态系统的跨学科挑战。我们设计并监测了一个集水区规模的实验，涉及整个城市集水区的城市雨水基础设施的改造，以恢复更多的自然水文，水质，因此，在接收流的生态条件。我们与政府当局和集水社区（居民和业主）合作多年，资助并实施了289个雨水保留系统。该项目的长度允许调整实验设计，以扩大项目的广度和保留系统的设计，以满足社区的需求和集水环境。规划条款对于这样的实验特别重要，以确保分散的实验处理的效果不会被在集水区其他地方创建新的连接的不透水区所抵消。集水区规模的实验有助于改变政策和做法，但其成功需要大量的努力和时间，以在人类主导的城市生态系统的众多不同利益攸关方之间建立信任。研究人员需要准备好采取适应性办法来实施此类实验，并在为实施支持实验所需的实地工作寻求资金方面发挥主导作用。
Restoration of ecological structure and function of urban streams probably requires catchment-scale modification of drainage infrastructure, but such catchment-scale restoration attempts and their assessment are rare. They require stream ecologists to embrace the interdisciplinary challenges of studying the social–ecological systems that are urban catchments. We designed and monitored a catchment-scale experiment that involved the retrofit of urban stormwater infrastructure throughout an urban catchment to restore more natural hydrology, water quality, and consequently, ecological condition in the receiving stream. We worked with government authorities and the catchment community (residents and property owners) over several years to fund and implement 289 stormwater retention systems. The length of the project allowed adaptation of the experimental design to expand the project’s breadth and of retention-system design to match community needs and catchment context. Planning provisions are particularly important for such an experiment to ensure that the effect of dispersed experimental treatments is not countered by creation of new connected impervious areas elsewhere in the catchment. Catchment-scale experiments can help to transform policy and practice, but their success requires substantial effort and time to build trust among the numerous, diverse stakeholders of human-dominated urban ecosystems. Researchers need to be prepared to adopt an adaptive approach to the implementation of such experiments and to play the lead role in seeking funds for the implementation of the on-ground works necessary to underpin the experiment.