Evaluation of Dormant Season Evapotranspiration

by Jerry L. Hatfield,
John H. Prueger,
Thomas J. Sauer,

Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water


Water use during the dormant season is often considered to be insignificant in terms of the total water balance. Evapotranspiration was measured over three fields with different crop covers during the winter of 1994–95 in central Iowa using a Bowen ratio system. Daily evapotranspiration ranged from less than 1 mmlday to over 3 mmlday and the evaporative fraction ranged from 40 to 90%. Evapotranspiration was a significant factor during the winter in Iowa.

Subject Headings: Evapotranspiration | Seasonal variations | Water use | Winter | Water balance | Crops | Evaporation | Iowa | United States

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