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Title: Limnological investigations : Lake Koocanusa, Montana. part 2 environmental analyses in the Kootenai River region, Montana
Authors: United States. Army. Corps of Engineers. Seattle District.
United States. National Aeronautics and Space Administration.
McKim, H. L. (Harlan L.)
Gatto, Lawrence W.
Merry, C. J.
Brockett, Bruce E.
Bilello, Michael A.
Hobbie, John E.
Brown, Jerry, 1936-
Keywords: Eutrophication
Water quality
Kootenai River, Montana
Lake Koocanusa, Montana
Satellites (artificial)
LANDSAT (satellite)
Remote sensing
Satellite photography
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 76-13.
Description: Special Report
Abstract: The purpose of this investigation was: 1) to compile and analyze climatic data for the past 10 years from all available weather observing stations in the East Kootenai River Basin, 2) to analyze changes in ice and snow cover, and turbidity and plankton blooms on Lake Koocanusa, 3) to assess the present limnology of Lake Koocanusa and the potential for water quality problems, especially eutrophication, and 4) to demonstrate the reliability of the LANDSAT Data Collection Platform (DCP)-Martek Water Quality Monitor system for acquisition of data from a remote site. Results of the investigations indicate that the Kootenay region is about twice as cold as the Libby region in winter, and that reservoir ice first forms along the shore in the northern region in late November and in the southern part in mid-December, with total freeze-over usually occurring 2 to 4 weeks later. Ice break-up in the northern sections usually occurs 1-3 weeks later than in southern areas; average annual snowfall is 42 to 144 in., with ice thickness and snowfall varying with relief. Variations in areal distribution of snow within the basin and ice cover on the reservoir were observable for periods from January to October 1973, and reservoir turbidity was observed to increase south of Ellsworth and Stenerson Mountains. Low algal productivity observed was due to the algae being circulated most of the time below the depth of 1% light and due to high turbidity. The DCP-Martek system operated well and reliable data were received while the system was located in the pool above Libby Dam and downstream below the pam. Brief interruptions in data transmissions occurred in April, when the Martek sensor showed a few minor inconsistencies, but the system demonstrated the feasibility of this technique for data acquisition from remote sites. NOTE: This file is large. Please allow your browser several minutes to download the file.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Special Report

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