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Modeling impact of storage zones on stream dissolved oxygen

Journal of Environmental Engineering

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DOI: 10.1061/(ASCE)0733-9372(1999)125:5(415)

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Abstract

The Streeter-Phelps dissolved oxygen model is modified to incorporate storage zones. A dimensionless number reflecting enhanced decomposition caused by the increased residence time of the biochemical oxygen demand in the storage zone parameterizes the impact. This result provides a partial explanation for the high decomposition rates observed in shallow streams. An application suggests that the storage zone increases the critical oxygen deficit and moves it closer to the point source. It also indicates that the storage zone should have lower oxygen concentration than the main channel. An analysis of a dimensionless enhancement factor indicates that the biochemical oxygen demand decomposition in small streams could be up to two to three times more than anticipated based on the standard Streeter-Phelps model without storage zones. For larger rivers, enhancements of up to 1.5 could occur.The Streeter-Phelps dissolved oxygen model is modified to incorporate storage zones. A dimensionless number reflecting enhanced decomposition caused by the increased residence time of the biochemical oxygen demand in the storage zone parameterizes the impact. This result provides a partial explanation for the high decomposition rates observed in shallow streams. An application suggests that the storage zone increases the critical oxygen deficit and moves it closer to the point source. It also indicates that the storage zone should have lower oxygen concentration than the main channel. An analysis of a dimensionless enhancement factor indicates that the biochemical oxygen demand decomposition in small streams could be up to two to three times more than anticipated based on the standard Streeter-Phelps model without storage zones. For larger rivers, enhancements of up to 1.5 could occur.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Modeling impact of storage zones on stream dissolved oxygen
Series title:
Journal of Environmental Engineering
DOI:
10.1061/(ASCE)0733-9372(1999)125:5(415)
Volume
125
Issue:
5
Year Published:
1999
Language:
English
Publisher:
ASCE
Publisher location:
Reston, VA, United States
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Environmental Engineering
First page:
415
Last page:
419
Number of Pages:
5