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1996•North American Water and Environment Congress & Destructive WaterRequires access

Evaluation of Dormant Season Evapotranspiration

Jerry Lee Hatfield, John H. Prueger, Thomas J. Sauer

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Abstract

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.

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What this paper is about

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.

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Available abstract

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.

Key concepts: Evapotranspiration, Environmental science, Water balance, Hydrology (agriculture), Growing season, Bowen ratio, Crop coefficient, Agronomy

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