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<p>The objective of this study is to evaluate the evapotranspiration calculated with the use of an electronic atmometer (ET<sub>G</sub>; mm) against the Penman–Monteith evapotranspiration (ET<sub>P-M</sub>; mm) by retrieving climatic data from a telemetric weather station. Evapotranspiration was overestimated by the atmometer with the daily mean ratio of ET<sub>G</sub> to ET<sub>P-M</sub> calculated at 1.88 (± 0.55). A linear regression model for predicting ET<sub>P-M</sub> from ET<sub>G</sub> was developed (ET<sub>P-M</sub> = 0.49ET<sub>G</sub> + 0.17) with coefficient of determination r<sup>2</sup> = 0.78 and with a beta value of 0.88. Once calibrated, atmometer provide a simple and cost-effective method for determining crop water needs, without relying on complex instrumentation. This is particularly important for irrigation scheduling, especially in semi-arid regions. However, daily evapotranspiration calculations should be preferred over hourly ones, due to the stronger correlation obtained between the ET<sub>G</sub> and ET<sub>P-M</sub>.</p>

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Electronic atmometer: a sustainable irrigation management device

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月2日

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  • Georgios Nikolaou,
  • Damianos Neocleous,
  • Efstathios Evangelides,
  • Evangelini Kitta

摘要

The objective of this study is to evaluate the evapotranspiration calculated with the use of an electronic atmometer (ETG; mm) against the Penman–Monteith evapotranspiration (ETP-M; mm) by retrieving climatic data from a telemetric weather station. Evapotranspiration was overestimated by the atmometer with the daily mean ratio of ETG to ETP-M calculated at 1.88 (± 0.55). A linear regression model for predicting ETP-M from ETG was developed (ETP-M = 0.49ETG + 0.17) with coefficient of determination r2 = 0.78 and with a beta value of 0.88. Once calibrated, atmometer provide a simple and cost-effective method for determining crop water needs, without relying on complex instrumentation. This is particularly important for irrigation scheduling, especially in semi-arid regions. However, daily evapotranspiration calculations should be preferred over hourly ones, due to the stronger correlation obtained between the ETG and ETP-M.