Area	Upper Big River
Topic	Temperature: Min, Max and Average (F), Upper Big River, 1998

 

Caption:  Daily Minimum, Maximum and Average water temperature at site 5219 in the Upper Big River Sub-basin did not exceed the lethal threshold of 75 degrees F in during the summer of 1998. The water temperature exhibited at this site, however, is unsuitable for coho salmon. The 75 degree F (23.9 C) daily maximum for coho salmon was chosen as a threshold for the North Coast Watershed Assessment Program based on literature review. This value, however, is based on laboratory tests and much lower temperatures will cause loss of coho in the wild (see Temperature Background page). See Info Links for more information. Data provided by the Forest Science Project found in Lewis et al. 2000. Click on Picture for map of locations.

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