The Physical Limnology of Lakelse Lake, British Columbia

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Abstract
Lakelse lake is a temperate, eutrophic lake situated on the eastern margin of the Coast Range mountains. For five years physical and chemical studies of this lake have been conducted as part of the Skeena River Salmon Investigation. Its area of 5.2 square miles (14.2 sq. km.) and mean depth of 24 feet (7.9 m.) provide a relatively small volume of water which is subject to considerable circulation from heavy winds sweeping in from the Pacific coast. Summer thermal stratification is varied and irregular, resulting in a proportionately large and unstable epilimnion. Except for a single bottom depression, oxygen concentrations remain at a high level throughout the year.During four months of the year the lake is ice covered. Large snow and ice fields provide an excellent reservoir for stream flow.Among the Skeena river lakes Lakelse is one of the most productive of sockeye salmon. Their survival does not appear to be limited directly by physical or chemical factors.

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