Wastewater‐effluent‐dominated streams as ecosystem‐management tools in a drier climate
Wastewater‐effluent‐dominated streams as ecosystem‐management tools in a drier climate
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以废水排放为主的河流作为干燥气候下的生态系统管理工具
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
V. Resh
中科院分区：
文献类型：
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作者：
R. Luthy;D. Sedlak;M. Plumlee;D. Austin;V. Resh
在半干旱地区，城市废水处理厂的取水和排水导致更多的城市河流依赖废水作为基流。这些以废水排放为主的河流支持着否则不会存在的常年河流生态系统。与此同时，污水排放下游的生态系统可以改善水质，支持水的再利用，创造栖息地，并提供城市设施。通过确定生物区系、生境、水文、地貌和水质的成功措施，水资源管理人员可以在未来气候条件下更好地设计、操作和监测以污水为主的水道。这需要制定明确定义的生态和社会目标，以及更好地了解越来越依赖废水来维持以废水为主的河流的生物群的后果。成功地量化这些项目的成本和效益可能会吸引有能力将与污水排放有关的环境扰动转化为新形式的环境改善的机构和社区的注意。
Water withdrawals and discharges from municipal wastewater-treatment plants in semiarid regions result in more urban streams becoming dependent on wastewater effluent for base flows. Such wastewater-effluent-dominated streams support perennial-stream ecosystems that would not otherwise exist. At the same time, ecosystems downstream of effluent discharges can improve water quality, support water re-use, create habitat, and provide urban amenities. By identifying measures of success for biota, habitat, hydrology, geomorphology, and water quality, water managers can better design, operate, and monitor effluent-dominated water courses under future climate conditions. This requires the development of clearly defined ecological and social objectives, as well as a better understanding of the consequences of increasing reliance on wastewater effluent to sustain the biota of effluent-dominated streams. Successful quantification of the costs and benefits of these projects is likely to attract the attention of agencies and communities that have the power to turn the environmental perturbations associated with effluent discharges into new forms of environmental enhancement.