||Relationship between water temperatures and air temperatures for central U.S. streams /
Preud'homme, Eric B. ;
Stefan, H. G.
||Minnesota Univ., Minneapolis. St. Anthony Falls Hydraulic Lab.;Environmental Research Lab.-Duluth, MN.
|| U.S. Environmental Protection Agency, Environmental Research Laboratory,
Water temperature--Climatic factors--United States. ;
Atmospheric temperature--Climatic factors--United States. ;
Rivers--Research--United States. ;
Temperature measurement ;
Water pollution ;
Atmospheric temperature ;
Mathematical models ;
Climatic changes ;
Shallow water ;
Diurnal variations ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||141 pages : illustrations ; 28 cm.
An analysis of the relationship between air and stream water temperature records for 11 rivers located in the central United States was conducted. The reliability of commonly available water temperature records was shown to be of unequal quality. Simple linear relationships between air (T sub a) and water (T sub w) temperatures were developed for daily and weekly average temperatures and showed some level of accuracy, especially for weekly average temperatures and for small streams. The general equations T sub w = 5.0 + 0.75 (T sub a) and (T sub w) = 2.9 + 0.86 (T sub a) simulated the daily and weekly temperatures of the 11 streams studied with a standard deviation between measurements and prediction of 2.7 C and 2.1 C, respectively. Predictions were better for shallow streams than for deep streams. Periods of ice cover were excluded from the analysis.
"September 1992." Includes bibliographical references. Microfiche.