Stochastic Analysis of Air and Water Temperatures

by Charles C. S. Song, (M.ASCE), Assoc. Prof.; Dept. of Civ. and Mineral Engrg. and St. Anthony Falls Hydr. Lab., Univ. of Minnesota, Minneapolis, MN,
Arthur F. Pabst, (A.M.ASCE), Res. Fellow; St. Anthony Falls Hydr. Lab., Univ. of Minnesota, Minneapolis, MN,
C. Edward Bowers, (F.ASCE), Prof.; Dept. of Civ. and Mineral Engrg. and St. Anthony Falls Hydr. Lab., Univ. of Minnesota, Minneapolis, MN,


Serial Information: Journal of the Environmental Engineering Division, 1973, Vol. 99, Issue 6, Pg. 785-800


Document Type: Journal Paper

Abstract: Water temperature data in streams and lakes are relatively difficult to obtain compared with air temperature data and other related hydrologic and meteorologic data. A procedure is proposed whereby synthetic daily water temperatures in a natural stream can be generated using available real or synthetic daily air temperature data and other physical parameters of the watershed. In addition to the seasonal variations, the short-term variations of the water temperature due to the atmospheric temperature fluctuations are included in this model as well as the purely random fluctuations. The results of the regression analysis of some available data in Minnesota suggest that the response coefficient relating the water temperature fluctuations and the air temperature fluctuations can be estimated using physical parameters of the watershed alone.

Subject Headings: Air temperature | Stochastic processes | Water temperature | Thermal analysis | Temperature effects | Hydrologic data | Weather forecasting | Parameters (statistics) | Watersheds | Rivers and streams | North America | Minnesota | United States

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