Use Requirements for Bowen Ratio and Eddy Correlation Determination of Evapotranspiration

by Bertrand D. Tanner, Campbell Scientific Inc, United States,

Document Type: Proceeding Paper

Part of: Planning Now for Irrigation and Drainage in the 21st Century


Reduced costs and complexity are encouraging more operational use of eddy correlation (EC) and energy balance Bowen ratio (EBBR) instrumentation for estimating evapotranspiration. Often little concern is given to the conditions under which valid estimates are obtained. Site requirements for one-dimensional transport are reviewed and instrumentation and logistical requirements of the EBBR and EC methods are compared. An EBBR and EC system is briefly described and measurements from a field trial shown.

Subject Headings: Eddy (fluid dynamics) | Correlation | Evapotranspiration | Water resources | Soil water | Field tests | Meteorology | Hydro power

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