Skip to Main Content
Hydrological response to timber harvest in northern Idaho: Implications for channel scour and persistence of salmonidsAuthor(s): Daniele Tonina; Charles H. Luce; Bruce Rieman; John M. Buffington; Peter Goodwin; Stephen R. Clayton; Shawkat Md. Ali; Jeffrey J. Barry; Charles Berenbrock
Source: Hydrological Processes. 22(17): 3223-3235.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
PDF: Download Publication (629.48 KB)
DescriptionThe potential for forest harvest to increase snowmelt rates in maritime snow climates is well recognized. However, questions still exist about the magnitude of peak flow increases in basins larger than 10 km2 and the geomorphic and biological consequences of these changes. In this study, we used observations from two nearly adjacent small basins (13 and 30 km2) in the Coeur d'Alene River basin, one with recent, relatively extensive, timber harvest, and the other with little disturbance in the last 50 years to explore changes in peak flows due to timber harvest and their potential effects on fish. Peak discharge was computed for a specific rain-on-snow event using a series of physical models that linked predicted values of snowmelt input to a runoff-routing model. Predictions indicate that timber harvest caused a 25% increase in the peak flow of the modelled event and increased the frequency of events of this magnitude from a 9-year recurrence interval to a 3·6-year event. These changes in hydrologic regime, with larger discharges at shorter recurrence intervals, are predicted to increase the depth and frequency of streambed scour, causing up to 15% added mortality of bull trout (Salvelinus confluentus) embryos. Mortality from increased scour, although not catastrophic, may have contributed to the extirpation of this species from the Coeur d'Alene basin, given the widespread timber harvest that occurred in this region.
- 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; Luce, Charles H.; Rieman, Bruce; Buffington, John M.; Goodwin, Peter; Clayton, Stephen R.; Ali, Shawkat Md.; Barry, Jeffrey J.; Berenbrock, Charles. 2008. Hydrological response to timber harvest in northern Idaho: Implications for channel scour and persistence of salmonids. Hydrological Processes. 22(17): 3223-3235.
Keywordspeak flows, rain-on-snow, bull trout, forest management, ecohydrology
- Extreme flood sensitivity to snow and forest harvest, western Cascades, Oregon, United States
- Changes in native bull trout and non-native brook trout distributions in the upper Powder River basin after 20 years, relationships to water temperature and implications of climate change
- Spawning demographics and juvenile dispersal of an adfluvial bull trout population in Trestle Creek, Idaho
XML: View XML