Main Title |
Effects of Temperature Variation on Critical Stream Dissolved Oxygen. |
Author |
Eheart, J. W. ;
Park, H. ;
|
CORP Author |
Illinois Univ. at Urbana-Champaign. Dept. of Civil Engineering.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. |
Publisher |
c1989 |
Year Published |
1989 |
Report Number |
EPA/600/J-89/068; |
Stock Number |
PB90-103730 |
Additional Subjects |
Dissolved gases ;
Oxygen ;
Water quality management ;
Temperature distribution ;
Mathematical models ;
Water pollution control ;
Design criteria ;
Low temperature tests ;
High temperature tests ;
Discharges ;
Sources ;
Unloading ;
Reprints ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB90-103730 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
9p |
Abstract |
The classical assumption that the lowest dissolved oxygen (DO) occurs at the highest temperature may not always hold. The DO saturation concentration decreases monotonically with increasing temperature, lowering the DO, but the reaeration coefficient increases monotonically with increasing temperature, tending to raise it. The decay coefficient monotonically increases with increasing temperature, lowering the DO for single discharges but not necessarily for multiple discharges. (Lower decay rates attending lower temperatures could result in low DO at the point where the impact from one discharge meets that of another.) The paper addressed the question of whether DO might under some circumstances worsen with decreasing temperature. Using a linear programming model it is shown that for a uniform stream at constant streamflow, the pattern of discharge that maximizes the derivative of critical dissolved oxygen with respect to temperature is an infinite uniformly distributed load. This suggests that streams receiving a large number of discharges may be more susceptible to DO increasing with decreasing temperature than streams receiving a small number of discharges. (Copyright (c) 1989 by the American Geophysical Union.) |
Supplementary Notes |
Pub. in Water Resources Research, v25 n2 p145-151 Feb 89. Sponsored by Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Effects of Temperature Variation on Critical Stream Dissolved Oxygen. |
Category Codes |
68D; 48G |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/14 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
932617152 |
Origin |
NTIS |
Type |
CAT |