Abstract
Pan coefficient (K pan) is the important factor for computation of reference evapotranspiration (ET o ) from pan evaporation (E pan). In this paper, the approaches proposed by Cuenca (Irrigation system design: an engineering approach. Prentice-Hall, Englewood Cliffs, 1989), Snyder (J Irrig Drain Eng 118(6):977–980, 1992), Orang (Potential accuracy of the popular non-linear regression equations for estimating pan coefficient values in the original and FAO-24 tables. Unpublished Report, Calif. Dept. of Water Resources, Sacramento, 1998), Raghuwanshi and Wallender (J Irrig Drain Eng 118 (6):977–980, 1998) and Pereira et al. (Agric Water Manage 76:75–82, 1995) were evaluated for a semi-arid region. By comparing with the FAO 56 Penman-Monteith (F-PM) method the Snyder (J Irrig Drain Eng 118(6):977–980, 1992, 1992) approach was best suited for the semi-arid region.
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Acknowledgments
The authors are thankful to the Department of Agro-meteorology, Marathwada Agricultural University Parbhani, Maharashtra, India for providing the data to carry out this study. Authors wish to thank the anonymous reviewers for their constructive suggestions to improve the quality.
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Communicated by J. Ayars.
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Gundekar, H.G., Khodke, U.M., Sarkar, S. et al. Evaluation of pan coefficient for reference crop evapotranspiration for semi-arid region. Irrig Sci 26, 169–175 (2008). https://doi.org/10.1007/s00271-007-0083-y
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DOI: https://doi.org/10.1007/s00271-007-0083-y