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Least squares support vector machine for modeling daily reference evapotranspiration

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Abstract

The accuracy of a least square support vector machine (LSSVM) in modeling of reference evapotranspiration (ET0) was examined in this study. The daily weather data, solar radiation, air temperature, relative humidity and wind speed of two stations, Glendale and Oxnard, in southern district of California, were used as inputs to the LSSVM models to estimate ET0 obtained using the FAO-56 Penman–Monteith equation. In the first part of the study, LSSVM estimates were compared with those of the following empirical models: Priestley–Taylor, Hargreaves and Ritchie methods. The comparison results indicated that the LSSVM performed better than the empirical models. In the second part of the study, the LSSVM results were compared with those of the conventional feed-forward artificial neural networks (ANN). It was found that the LSSVM models were superior to the ANN in modeling ET0 process.

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Authors and Affiliations

  1. Architecture and Engineering Faculty, Civil Engineering Department, Canik Basari University, Samsun, Turkey

    Ozgur Kisi

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  1. Ozgur Kisi
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Correspondence to Ozgur Kisi.

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Communicated by K. Stone.

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Kisi, O. Least squares support vector machine for modeling daily reference evapotranspiration. Irrig Sci 31, 611–619 (2013). https://doi.org/10.1007/s00271-012-0336-2

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  • DOI: https://doi.org/10.1007/s00271-012-0336-2

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