2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 2:15 PM - 2:30 PM | SCALE AND STREAM RESTORATIONS: DAM AND CHANNEL RESTORATION PROJECTS | 150 DEF
SCALE AND STREAM RESTORATIONS: DAM AND CHANNEL RESTORATION PROJECTS
Increasingly, bioassessments are being used to assess stream restoration outcomes by measuring the resulting changes in biotic assemblage structure or function. We conducted a literature review of stream restorations that had bioassessments worldwide, particularly in North America, Europe, and Australia. Here, we summarize the results of two restoration types: dam removal or operation changes (21 studies) and channel restoration (26 studies). In some cases, untreated stressors influenced the restoration outcomes. In other cases, there were mismatches in the temporal or spatial scale of the restoration. For example, biomonitoring to measure restoration effects was conducted too soon after the restoration to observe effects, or the sources and stressors needing remediation occurred at a larger spatial scale than that of the restoration. In general, dam projects often improved biotic measurements, but this was not so for channel restorations. As individual dams are a relatively discrete stressor source. dam removal appears to match the spatial scale of the associated stressors, but the spatial scales were less consistent for channel restoration. The views expressed are those of the authors and do not necessarily reflect the views or policies of the U.S. Environmental Protection Agency.
- Bioassessment
- Connectivity
- Disturbance
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Presenters/Authors
Michael Griffith
(), U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Cincinnati, OH 45268, griffith.michael@epa.gov;
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Michael McManus
(), U.S. Environmental Protection Agency, Office of Research and Development, National Center for Environmental Assessment, Cincinnati, Ohio 45268, mcmanus.michael@epa.gov;
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