Skip to Main Content
Climate change impact on salmonid spawning in low-gradient streams in central Idaho, USAAuthor(s): Daniele Tonina; James A. McKean
Source: In: Tao, J.; Chen, Q.; Liong, S-Y, eds. Proceedings of 9th International Conference on Hydroinformatics 2010; 7-11 September 2010; Tianjin, China. Beijing: Chemistry Industry Press. p. 389-397.
Publication Series: Miscellaneous Publication
PDF: View PDF (265.09 KB)
DescriptionClimate change is often predicted to cause a significant perturbation to watershed hydrology. It has been generally associated with negative impacts on natural systems, especially in conjunction with conservation and protection of sensitive ecosystems. In the U.S., spawning habitats of threatened and endangered salmonid species are important areas that are potentially vulnerable to climate change through variations in flood timing and magnitude, water temperature, and sediment input. In this work, we used a numerical model to investigate whether changes in flow regime, of the type predicted by some climate change scenarios for mountain streams in the western U.S.A., would affect spawning site stability. We ran a two dimensional hydraulic model that simulated several flow regimes from low to bankfull stage and mapped grain mobility. We defined the model boundary conditions with high-resolution airborne bathymetric lidar surveys of an important spawning stream in central Idaho, USA. Our analyses showed that such unconfined low-gradient streams have not a great danger of extensive bed mobility, even at high flows. Consequently, in this landscape, alterations in flood timing due to climate change are unlikely to decrease the success rate of salmonid egg incubation by the mechanism of increased channel bed scour.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationTonina, Daniele; McKean, James A. 2010. Climate change impact on salmonid spawning in low-gradient streams in central Idaho, USA. In: Tao, J.; Chen, Q.; Liong, S-Y, eds. Proceedings of 9th International Conference on Hydroinformatics 2010; 7-11 September 2010; Tianjin, China. Beijing: Chemistry Industry Press. p. 389-397.
Keywordsclimate change, salmonid, spawning habitats
- Bed stability in unconfined gravel bed mountain streams: With implications for salmon spawning viability in future climates
- Coupling hydrodynamic modeling and empirical measures of bed mobility to assess the risk of redd scour on a large regulated river
- Global climate change and potential effects on Pacific salmonids in freshwater ecosystems of southeast Alaska
XML: View XML