Skip to main content
Log in

Predicting daily reference evapotranspiration rates in a humid region, comparison of seven various data-based predictor models

  • Original Paper
  • Published:
Stochastic Environmental Research and Risk Assessment Aims and scope Submit manuscript

Abstract

The reference crop evapotranspiration (ET0) is one of the major components of the hydrological cycle, and its prediction is of great importance in agricultural operations, especially irrigation, of field and horticultural crops. The present study aims to evaluate the performances of two stochastic and machine learning models in predicting ET0 for Mazandaran province, which is one of the most important centers of rice cultivation (as a high-water use plant) in Iran. The studied data belong to 5 synoptic stations in Mazandaran province. They include minimum, maximum, and mean air temperature, minimum, maximum, and mean relative humidity, wind speed, and sunshine duration. These data are received on a daily basis from the Iranian Meteorological Organization during the period 2003–2018. Then, these variables and the FAO-56 Penman-Monteith model are used to calculate daily ET0 rates. Moreover, stochastic models including autoregressive (AR), moving average (MA), autoregressive moving average (ARMA), and autoregressive integrated moving average (ARIMA), and machine learning models including least square support vector machine (LSSVM), adaptive neuro-fuzzy inference system (ANFIS), and generalized regression neural network (GRNN) are used to predict ET0. Predictor inputs include ET0 time lags selected by Autocorrelation Function (ACF) and partial ACF (PACF). The time series models of ARMA and ARIMA, and the machine learning model of LSSVM provide the most accurate predictions with the slight superiority of ARMA and ARIMA over LSSVM in most cases. As a result, it is found that stochastic models are superior to machine learning models due to their more accurate prediction and less complexity. The ARMA model (root mean square error = 0.623\(\frac{mm}{day}\), Wilmott index = 0.962, and R2 = 86.22%) shows the highest prediction accuracy. The current approach can be applied to predict irrigation water requirements and has research value under similar or different climatic conditions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10

Similar content being viewed by others

Availability of data and materials

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

References

Download references

Acknowledgements

The authors would like to thank the Sari Agricultural Sciences and Natural Resources University (SANRU) for financial support of this research under contract number “02-1400-08”. The authors acknowledge the Iranian Meteorological Organization (IRIMO) for the availability of daily meteorological data, and also thank the editor and the reviewers for their valuable time to review the article.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Reza Norooz-Valashedi.

Ethics declarations

Conflict of interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Additional information

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Aghelpour, P., Norooz-Valashedi, R. Predicting daily reference evapotranspiration rates in a humid region, comparison of seven various data-based predictor models. Stoch Environ Res Risk Assess 36, 4133–4155 (2022). https://doi.org/10.1007/s00477-022-02249-4

Download citation

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00477-022-02249-4

Keywords

Navigation