Show simple item record J. E. en_US G. B. en_US Joseph en_US 2008-12-16T09:56:38Z 2008-12-16T09:56:38Z 2006-06-05 en_US
dc.identifier en_US
dc.identifier.citation Merz , J E , Pasternack , G B & Wheaton , J 2006 , ' Sediment budget for salmonid spawning habitat rehabilitation in a regulated river ' Geomorphology , vol 76 , no. 1-2 , pp. 207-228 . , 10.1016/j.geomorph.2005.11.004 en_US
dc.identifier.other PURE: 96114 en_US
dc.identifier.other dspace: 2160/1674 en_US
dc.description.abstract Bed elevation, feature adjustments, and spawning use were monitored at three Chinook salmon (Oncorhynchus tschawytscha) spawning habitat rehabilitation sites to measure project longevity in a regulated river. Sites enhanced with 649–1323 m3 of gravel lost from 3–20% of remaining gravel volume annually during controlled flows of 8–70 m3/s and 2.6–4.6% of placed material during a short-duration (19 days) release of 57 m3/s. The oldest site lost 50% of enhancement volume over 4 years. Of the mechanisms monitored, gravel deflation was the greatest contributor to volumetric reductions, followed by hydraulic scour. Spawning, local scour around placed features, and oversteepened slopes contributed to volumetric changes. As sites matured, volumetric reductions decreased. Sites captured as much large woody debris as was lost. While complexity is an extremely important aspect of ecological function, artificial production of highly diverse and complex habitat features may lead to limited longevity without natural rejuvenation. en_US
dc.format.extent 22 en_US
dc.relation.ispartof Geomorphology en_US
dc.title Sediment budget for salmonid spawning habitat rehabilitation in a regulated river en_US
dc.contributor.pbl Institute of Geography & Earth Sciences en_US
dc.contributor.pbl River Basin Dynamics and Hydrology en_US

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