| 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. |
| Genre: | Article |
| ProdID: | 70021566 |
| Citation Author: | Chapra, S. C.; Runkel, R. L. |
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| Citation End Page: | 419 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Environmental Engineering |
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| Citation Number Of Pages: | 5 |
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| Citation Publisher: | ASCE |
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| Citation Search Results Text: | Modeling impact of storage zones on stream dissolved oxygen; 1999; Article; Journal; Journal of Environmental Engineering; Chapra, S. C.; Runkel, R. L. |
| Citation Start Page: | 415 |
| Citation Volume: | 125 |
| Citation Year: | 1999 |
| Type: | citation/reference |
| Text: | Modeling impact of storage zones on stream dissolved oxygen; 1999; Article; Journal; Journal of Environmental Engineering; Chapra, S. C.; Runkel, R. L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1061/(ASCE)0733-9372(1999)125:5(415) |
| Date Other: | Fri, 1 Jan 1999 00:00 -0600 |
| Publisher: | ASCE |
