Evaluating stream restoration projects |
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Authors: | G Mathias Kondolf Elisabeth R Micheli |
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Institution: | (1) Department of Landscape Architecture, University of California, 94720 Berkeley, California, USA |
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Abstract: | River and stream restoration projects are increasingly numerous but rarely subjected to systematic postproject evaluation.
Without conducting such evaluation and widely disseminating the results, lessons will not be learned from successes and failures,
and the field of river restoration cannot advance. Postproject evaluation must be incorporated into the initial design of
each project, with the choice of evaluation technique based directly upon the specific project goals against which performance
will be evaluated. We emphasize measurement of geomorphic characteristics, as these constitute the physical framework supporting
riparian and aquatic ecosystems. Techniques for evaluating other components are briefly discussed, especially as they relate
to geomorphic variables. Where possible, geomorphic, hydrologic, and ecological variables should be measured along the same
transects. In general, postproject monitoring should continue for at least a decade, with surveys conducted after each flood
above a predetermined threshold. Project design should be preceded by a historical study documenting former channel conditions
to provide insights into the processes suggest earlier, potentially stable channel configurations as possible design models. |
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Keywords: | stream restoration Riparian vegetation Flood control Aquatic habitat |
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