2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/05/2017 | 10:00 AM - 10:15 AM | A COMPARISON OF CHANNEL SHADE AND HYPORHEIC EXCHANGE ON SEASONAL PATTERNS OF STREAM TEMPERATURE | 302B
A COMPARISON OF CHANNEL SHADE AND HYPORHEIC EXCHANGE ON SEASONAL PATTERNS OF STREAM TEMPERATURE
Channel shading and hyporheic exchange both have the potential to damp the amplitude of daily and annual stream temperature cycles, but operate via different mechanisms. Because of these mechanistic differences, subtle to substantial shifts in the timing and magnitude of temperature damping in the stream channel may exist. Therefore, we compared the daily and seasonal effects of channel shading versus hyporheic exchange using a reach-scale model of channel temperature that incorporates atmospheric heat exchange and a hydrologically-accurate representation of the hyporheic zone. In summer, the magnitude of seasonal channel cooling associated with an expansive, coarse-grained hyporheic zone was similar to shading effects. However, the differences between shading and hyporheic exchange effects were most pronounced in the winter when channel warming associated with hyporheic exchange was substantially greater than warming associated with shade. Whereas shade effects are largely limited to summer, hyporheic exchange showed substantial influences on stream temperatures throughout the year. Understanding the differences between how hyporheic exchange and shade influence stream temperature has the potential to guide restoration and management decisions in thermally degraded streams.
- C16 Restoration Ecology
- C28 Land-Water Interfaces
- C14 Hydroecology
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Presenters/Authors
Katie Fogg
(), Montana State University, s.katie.fogg@gmail.com;
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Geoffrey Poole
(), Montana State University, Montana Institute on Ecosystems, gpoole@montana.edu ;
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Scott O'Daniel
(), Umatilla Tribes, scottodaniel@ctuir.org;
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Ann Marie Reinhold
(), Montana State University, Montana Institute on Ecosystems, reinhold@montana.edu;
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