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Lake Number: A Long-Term Lake Water Quality Predictor

by Midhat Hondzo,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

A seasonal maximum Lake number was found to be a good predictor for volume averaged water temperatures, maximum water temperatures near lake bottom, seasonal stratification characteristics, volume averaged dissolved oxygen concentrations, and anoxia characteristics. Lakes with a maximum daily Lake number bigger than 1.0, are seasonally stratified, and have low hypolimnetic dissolved oxygen concentration. Lakes with maximum daily Lake number less than 1.0 are polymictic, and with high dissolved oxygen concentration. Empirical formulas for lake water quality and stratification indicators derived from the simulation results give good predictions of temperature and dissolved oxygen characteristics estimated from measurements in seven Minnesota lakes.

Subject Headings: Lakes | Dissolved oxygen | Water quality | Seasonal variations | Water temperature | Water stratification | Temperature effects | Minnesota | United States

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