One-dimensional reservoir-lake temperature and dissolved oxygen model

Water-Resources Investigations Report 82-5



This report describes and documents a one-dimensional computer model that predicts dissolved-oxygen and temperature profiles in a lake or reservoir. Downstream release dissolved-oxygen concentrations and temperatures also are computed based on a user-specified outflow withdrawal elevation. The model can, therefore, be used to compare top-draw versus bottom-draw outlet configuration effects on downstream dissolved-oxygen and temperature conditions.

The dissolved-oxygen and temperature profiles are computed for a conceptual vertical water column located at the deepest point in the lake or reservoir.. The water column is divided into a series of uniform thickness horizontal layers for computation purposes. The model operates on a daily simulation interval, with summary output given for each day and detailed depth profiles printed on user-specified days. Model options allow the simulation of 5-day biochemical oxygen demand, sediment oxygen demand, and the density current effects of inflowing suspended sediment.

The model is a modification of the U.S. Army Corps of Engineer's "WESTEX" model number 722-F5-E1011. The user-specified withdrawal elevation, dissolved oxygen, biochemical oxygen demand, sediment oxygen demand, and suspended sediment simulation capabilities were not present in the earlier "WESTEX" model. The model is capable of simulating a stratified reservoir pool environment.

This reservoir-lake model is most applicable to preliminary or reconnaissance studies of a proposed impoundment. Other more complex and accurate models exist to model existing lakes or reservoirs where onsite data can be collected.

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title One-dimensional reservoir-lake temperature and dissolved oxygen model
Series title Water-Resources Investigations Report
Series number 82-5
DOI 10.3133/wri825
Year Published 1981
Language English
Publisher U.S. Geological Survey
Description v, 114 p.
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