The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners.
As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.
i
Changes in Streambed Composition in Salmonid Spawning Habitat of the Elwha River during Dam Removal
-
2017
-
-
Source: JAWRA Journal of the American Water Resources Association, 53(4), 871-885
[PDF-690.40 KB]
Details:
-
Journal Title:JAWRA Journal of the American Water Resources Association
-
Personal Author:
-
NOAA Program & Office:
-
Description:One uncertainty associated with large dam removal is the level of downstream sediment deposition and associated short-term biological effects, particularly on salmonid spawning habitat. Recent studies reportdownstream sediment deposition following dam removal is influenced by proximity to the source and river trans-port capacity. The impacts of dam removal sediment releases are difficult to generalize due to the relativelysmall number of dam removals completed, the variation in release strategies, and the physical nature of sys-tems. Changes to sediment deposition and associated streambed composition in the Elwha River, WashingtonState, were monitored prior to (2010-2011) and during (2012-2014) the simultaneous removal of two large dams(32 and 64 m). Changes in the surface layer substrate composition during dam removal varied by year and channel type. Riffles in floodplain channels downstream of the dams fined and remained sand dominated throughout the study period, and exceeded levels known to be detrimental to incubating salmonids. Mainstemriffles tended to fine to gravel, but appear to be trending toward cobble after the majority of the sediment wasreleased and transported through system. Thus, salmonid spawning habitats in the mainstem appear to havebeen minimally impacted while those in floodplain channels appear to have been severely impacted during damremoval. (KEY TERMS: sediment; sediment transport; sediment composition; restoration; environmental impacts.)Peters, Roger J., Martin Liermann, Michael L. McHenry, Paul Bakke, and George R. Pess, 2017. Changes in Streambed Composition in Salmonid Spawning Habitat of the Elwha River during Dam Removal. Journal of the American Water Resources Association (JAWRA) 53(4): 871-885. https://doi.org/10.1111/1752-1688.12536
-
Keywords:
-
Source:JAWRA Journal of the American Water Resources Association, 53(4), 871-885
-
DOI:
-
ISSN:1093-474X
-
Format:
-
Publisher:
-
Document Type:
-
License:
-
Rights Information:CC0 Public Domain
-
Rights Statement:This article is a U.S. Government work and is in the public domain in the USA
-
Compliance:Library
-
Main Document Checksum:
-
Download URL:
-
File Type:
