Sediment budget for salmonid spawning habitat rehabilitation in a regulated river

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dc.contributor.author Merz, J. E.
dc.contributor.author Pasternack, G. B.
dc.contributor.author Wheaton, Joseph
dc.date.accessioned 2008-12-16T09:56:38Z
dc.date.available 2008-12-16T09:56:38Z
dc.date.issued 2006-06-05
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 . en
dc.identifier.issn 0169-555X
dc.identifier.other PURE: 96114
dc.identifier.other dspace: 2160/1674
dc.identifier.uri http://hdl.handle.net/2160/1674
dc.description Wheaton, Joseph, Merz, J.E., Pasternack, G.B., (2006) 'Sediment budget for salmonid spawning habitat rehabilitation in a regulated river', Geomorphology 76(1-2) pp.207-228 RAE2008 en
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
dc.format.extent 22 en
dc.language.iso eng
dc.relation.ispartof Geomorphology en
dc.title Sediment budget for salmonid spawning habitat rehabilitation in a regulated river en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/j.geomorph.2005.11.004
dc.contributor.institution Institute of Geography & Earth Sciences en
dc.contributor.institution River Basin Dynamics and Hydrology en
dc.description.status Peer reviewed en


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