Sediments And Sediment-Water Nutrient Interchange In Upper Klamath Lake, Oregon
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Date
1974-08
Journal Title
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Abstract
Description
Upper Klamath Lake, a very large, shallow lake in south-central Oregon,
has a history of nuisance blue-green algae blooms, predominantly
Aphanizomenon flos-aquae. Lake water and sediment interstitial water chemistry were monitored during 1968 and 1969, and for a short time
in 1970. Nutrient concentrations in interstitital water of sediment exposed to direct agricultural drainage were several orders of magnitude
greater than in cases where sediments were not so located. Nutrient
concentrations showed considerable seasonal variation in both interstitial
Nutrient
and lake waters. Variations in lake and intersitital waters frequently,
but not always, exhibited inverse relationships. The larger fluctuations
appeared to correlate with density of A. flos-aquae. Although strong evidence of biological uptake of sedimentary nutrients
was found, dredging of the lake would probably not be effective as
a restorative measure because of the high nutrient concentrations
present at depth in the sediment.
Keywords
Sediments, Sediment-Water Nutrient, Upper Klamath Lake, Orgeon