Dissolved Oxygen Variations in Stratified Lakes

by David A. Bella, (A.M.ASCE), Asst. Prof. of Civ. Engrg.; Oregon State Univ., Corvallis, OR,

Serial Information: Journal of the Sanitary Engineering Division, 1970, Vol. 96, Issue 5, Pg. 1129-1146

Document Type: Journal Paper

Errata: (See full record)

Abstract: A mathematical model describing the dissolved oxygen variations in a stratified lake is developed. The model is one-dimensional and includes DO variations with depth and time. The model describes the combined effect of reaeration, photosynthetic oxygenation; vertical mixing and oxygen uptake. A method of calculating hypolimnetic oxygen uptake rates is presented, and the possible role of benthal oxygen uptake is analyzed. A series of model computations using finite-difference methods demonstrates that hypolimnetic oxygen levels within stratified lakes were more sensitive to both vertical mixing and oxygen uptake than to either photosynthetic oxygenation or reaeration.

Subject Headings: Dissolved oxygen | Mathematical models | Water stratification | Lakes | Aeration | Mathematics | Computer models |

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