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Picture of the Day
Thermal Barrier

This graphic clearly demonstrates the thermal barrier effect. Adult steelhead passage numbers have been growing steadily all summer, until last week, when daily counts plummeted from over 3500 fish per day to under 500 fish per day. Take a look at the corresponding graph of water temperatures and it all make sense.

Graphic created using the Columbia River DART.
School of Aquatic & Fishery Sciences
University of Washington

Edited by Matt
Edited By Matt

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