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Wenatchee River Temperature Total Maximum Daily Load Study

Publication number Date Published
05-03-011August 2005
VIEW NOW Wenatchee River Temperature Total Maximum Daily Load Study (Number of pages: 149) (Publication Size: 7MB)

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Author(s) Cristea, N. and G. Pelletier
Description Stream temperature monitoring in 2002 and 2003 in the Wenatchee River Basin showed that current conditions at many locations were warmer than the current and proposed water quality standards. In addition, many locations were found to be cooler than the temperature standards. Under 7Q10 flow conditions with full site-potential mature riparian vegetation, significant temperature reductions of 3.8 degrees C and 1.4 degrees C can be expected for Nason Creek and Icicle Creek respectively, while the Wenatchee River can expect a 0.3 degrees C reduction. Temperatures with improvements under critical (7Q10) conditions are predicted to be less than the threshold for fish lethality of 23 degrees C, but greater than the 18 degrees C Class A and 16 degrees C Class AA numeric criteria in many areas. Temperatures with improvements under average (7Q2) conditions are predicted to have greater benefits to the Wenatchee River and its tributaries.

This analysis uses effective shade as a surrogate measure of heat flux to fulfill the requirements of Section 303(d) for a temperature TMDL.
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Keywords Mission, Wenatchee River, stream, creek, reduction, Flux, flow, temperature, model, fish, 303(d), section 303, basin, river, water, Total Maximum Daily Load, lake
WATERSHED Water Resource Inventory Area 45 Wenatchee
DATA Environmental Information Management (EIM) #WENRTMDL


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