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首页> 外文期刊>Journal of the American Water Resources Association >COMPENSATORY MITIGATION FOR STREAMS UNDER THE CLEAN WATER ACT:REASSESSING SCIENCE AND REDIRECTING POLICY
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COMPENSATORY MITIGATION FOR STREAMS UNDER THE CLEAN WATER ACT:REASSESSING SCIENCE AND REDIRECTING POLICY

机译：清洁水法下的流域补偿性移民：重新评估科学和重新制定政策

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摘要

Current stream restoration science is not adequate to assume high rates of success in recovering ecosystem functional integrity. The physical scale of most stream restoration projects is insufficient because watershed land use controls ambient water quality and hydrology, and land use surrounding many restoration projects at the time of their construction, or in the future, do not provide sufficient conditions for functional integrity recovery. Reach scale channel restoration or modification has limited benefits within the broader landscape context. Physical habitat variables are often the basis for indicating success, but are now increasingly seen as poor surrogates for actual biological function; the assumption "if you build it they will come" lacks support of empirical studies. If stream restoration is to play a continued role in compensatory mitigation under the United States Clean Water Act, then significant policy changes are needed to adapt to the limitations of restoration science and the social environment under which most projects are constructed. When used for compensatory mitigation, stream restoration should be held to effectiveness standards for actual and measurable physical, chemical, or biological functional improvement. To achieve improved mitigation results, greater flexibility may be required for the location and funding of restoration projects, the size of projects, and the restoration process itself.
机译：当前的流恢复科学不足以假设恢复生态系统功能完整性的成功率很高。大多数流域恢复项目的物理规模是不够的，因为流域土地利用会控制周围的水质和水文，并且许多恢复项目在建设之时或将来不会为功能完整性的恢复提供足够的条件。在更广泛的景观环境中，达到或恢复规模河道的好处有限。物理栖息地变量通常是成功的基础，但现在越来越多地被视为对实际生物学功能的替代品； “如果您建造它，它们就会来”的假设缺乏实证研究的支持。如果根据美国《清洁水法》，河流恢复在补偿性减灾中继续发挥作用，那么就需要进行重大的政策调整，以适应恢复科学的局限性和大多数项目所依据的社会环境。当用于补偿性减灾时，溪流的恢复应符合有效性标准，以进行实际和可测量的物理，化学或生物功能改进。为了获得更好的缓解效果，恢复项目的位置和资金，项目的规模以及恢复过程本身可能需要更大的灵活性。

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