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Methods for Determining Actual Evapotranspiration in Plots

by Nader Katerji, Inst Natl de la Recherche, Agronomique, France,
Philippe Grebet, Inst Natl de la Recherche, Agronomique, France,



Document Type: Proceeding Paper

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

Abstract:

The major methods used at INRA since 1965 for determining actual evapotranspiration (AET) in plots are reviewed in this paper. These procedures involve either direct determination (weighing lysimeter) or indirect determination (Bowen ratio method, simplified aerodynamic method, or soil water balance method). The methods are described and critically examined, with emphasis on their respective strengths and weaknesses.

Subject Headings: Soil water | Evapotranspiration | Water resources | Soil strength | Water balance | Renewable energy | Moisture

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