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The US Fish and Wildlife Service, Columbia
River Fisheries Program Office, contracted Watershed Sciences, LLC, from
Corvallis, Oregon, to conduct a thermal infrared (TIR) remote sensing survey,
also known as forward-looking infrared (FLIR), on the entire mainstem Walla
Walla River and the lower ten miles of the South Fork Walla Walla River on
August 13, 2003. The purpose of the study was to identify spatial temperature patterns within the basin, locate cool water seeps where fish, specifically bull trout, may find refuge during warm summer water temperatures, and compare this study to the 2000 FLIR flight conducted when there was less surface water flowing through the levy section near Milton-Freewater, Oregon. In addition to these main objectives, USFWS hopes other people working in the basin will be able to use the data to further other research and management efforts. Read the letter from Tad Kisaka, USFWS, providing the data to WWBWC (97KB, PDF) Download the summary report for the 2003 TIR (1.7 MB, PDF) Questions about the report and/or the raw data should be directed to Bob Bower, WWBWC Hydrologist, (541) 938-2170. |
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