The findings and conclusions in this article are those of the author and do not necessarily represent the views of the U.S. Fish and Wildlife Service.
MODELLING CHANGES IN SALMON HABITAT ASSOCIATED WITH RIVER CHANNEL RESTORATION AND FLOW-INDUCED CHANNEL ALTERATIONS†
Version of Record online: 24 JAN 2013
Published 2013. This article is a U.S. Government work and is in the public domain in the USA.
River Research and Applications
Volume 30, Issue 1, pages 40–44, January 2014
How to Cite
Gard, M. (2014), MODELLING CHANGES IN SALMON HABITAT ASSOCIATED WITH RIVER CHANNEL RESTORATION AND FLOW-INDUCED CHANNEL ALTERATIONS. River Res. Applic., 30: 40–44. doi: 10.1002/rra.2642
- Issue online: 6 JAN 2014
- Version of Record online: 24 JAN 2013
- Manuscript Accepted: 20 DEC 2012
- Manuscript Revised: 11 DEC 2012
- Manuscript Received: 1 MAY 2012
- river restoration;
- habitat enhancement;
- adaptive management;
- fall-run Chinook salmon (Oncorhynchus tschawytscha);
- validation of habitat predictions
The River2D two-dimensional hydraulic and habitat model was used to simulate fall-run Chinook salmon (Oncorhynchus tschawytscha) spawning and fry and juvenile rearing habitat of the first phase of a stream channel restoration project on Clear Creek, California. Habitat was simulated for a range of stream flows: (1) before restoration; (2) based on the restoration design; (3) immediately after restoration; and (4) after one and two large flow events. Hydraulic and structural data were collected for three sites before restoration, and prerestoration habitat was simulated. Habitat simulated for these sites was extrapolated to the prerestoration area based on habitat mapping. The topographical plan for the restoration was used to simulate the anticipated habitat after restoration. Although the restoration increased spawning habitat, it was less successful for rearing habitat. Channel changes associated with high-flow events did not entirely negate the benefits of the restoration project. The results of this study point out the need for models that can simulate the changes in channel topography associated with high-flow events, which could then be used to simulate habitat over time. Published 2013. This article is a U.S. Government work and is in the public domain in the USA.