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Technical Note: on the Matt–shuttleworth Approach to Estimate Crop Water Requirements : Volume 11, Issue 4 (14/04/2014)

By Lhomme, J. P.

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Book Id: WPLBN0004012081
Format Type: PDF Article :
File Size: Pages 17
Reproduction Date: 2015

Title: Technical Note: on the Matt–shuttleworth Approach to Estimate Crop Water Requirements : Volume 11, Issue 4 (14/04/2014)  
Author: Lhomme, J. P.
Volume: Vol. 11, Issue 4
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Masmoudi, M. M., Lhomme, J. P., & Boudhina, N. (2014). Technical Note: on the Matt–shuttleworth Approach to Estimate Crop Water Requirements : Volume 11, Issue 4 (14/04/2014). Retrieved from

Description: IRD (UMR LISAH), 2 Place Viala, 34060 Montpellier, France. The Matt–Shuttleworth method provides a way to make a one-step estimate of crop water requirements with the Penman–Monteith equation by translating the crop coefficients, commonly available in FAO publications, into equivalent surface resistances. The methodology is based upon the theoretical relationship linking crop surface resistance to crop coefficient and involves the simplifying assumption that the reference crop evapotranspiration (ET0) is equal to the Priestley–Taylor estimate with a fixed coefficient of 1.26. This assumption, used to eliminate the dependence of surface resistance on certain weather variables, is questionable: numerical simulations show that it can lead to substantial differences between the true value of surface resistance and its estimate. Consequently, the basic relationship between surface resistance and crop coefficient, without any assumption, appears to be more appropriate for inferring crop surface resistance, despite the interference of weather variables.

Technical Note: On the Matt–Shuttleworth approach to estimate crop water requirements

Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: Crop Evapotranspiration, Irrig. Drainage Paper No 56, United Nations FAO, Rome, 1998.; De Bruin, H. A. R.: A model of the Priestley–Taylor parameter α, J. Appl. Meteorol., 22, 572–578, 1983.; Doorenbos, J. and Pruitt, W. O.: Crop water requirements, Irrig. Drainage Paper No 24, United Nations FAO, Rome, 1977.; Jensen, M. E., Burman, R. D., and Allen, R. G.: Evapotranspiration and Irrigation Water Requirements, ASCE Manuals and Reports on Engineering Practices No 70, ASCE, New York, 1990.; McNaughton, K. G. and Spriggs, T. W.: An evaluation of the Priestley–Taylor equation, in: Estimation of Areal Evaporation, IAHS Publication No 177, Wallingford, UK, 89–104, 1989.; Monteith, J. L.: Evaporation and environment, Symp. Soc. Exp. Biol., 19, 205–234, 1965.; Pereira, L. S., Perrier, A., Allen, R. G., and Alves, I.: Evapotranspiration: concepts and future trends, J. Irrig. Drain. E.-ASCE, 125, 45–51, 1999.; Priestley, C. H. B. and Taylor, R. J.: On the assessment of surface heat flux and evaporation using large-scale parameters, Mon. Weather Rev., 100, 81–92, 1972.; Shuttleworth, W. J.: Evaporation, in: Handbook of Hydrology, edited by: Maidment, D. R., McGraw-Hill, New York, USA, 4.1–4.53, 1993.; Shuttleworth, W. J.: Towards one-step estimation of crop water requirements, T. ASABE, 49, 925–935, 2006.; Shuttleworth, W. J.: Putting the vap into evaporation, Hydrol. Earth Syst. Sci., 11, 210–244, doi:10.5194/hess-11-210-2007, 2007.; Shuttleworth, W. J. and Wallace, J. S.: Calculating the water requirements of irrigated crops in Australia using the Matt–Shuttleworth approach, T. ASABE, 52, 1895–1906, 2009.


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