A Decision Support System for Irrigation Scheduling Using a Reduced-Size Pan
An automatic, weight-based, small 20 cm diameter pan was used for real-time calculations of evaporation and precipitation in a semiarid environment. The water evaporated from the evaporimeter (E<sub>P</sub>) was found to be a significant predictor of evapotranspiration (ET<sub>O<...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/15/4/848 |
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| Summary: | An automatic, weight-based, small 20 cm diameter pan was used for real-time calculations of evaporation and precipitation in a semiarid environment. The water evaporated from the evaporimeter (E<sub>P</sub>) was found to be a significant predictor of evapotranspiration (ET<sub>O</sub>; r<sup>2</sup> = 0.84), which was calculated with the Penman–Monteith (P-M) equation by retrieving climatic data from a weather station. The results revealed seasonal variations of the pan coefficient (K<sub>P</sub>; dimensionless), with a mean value estimated at 0.84 (±0.16). Validation of ET<sub>O</sub> measurements using a calibrated regression model (ET<sub>O</sub> = 0.831*E<sub>P</sub> + 0.025), against the P-M equation indicated a high correlation coefficient (r<sup>2</sup> = 0.99, slope of the regression line of 0.9). The present paper evaluates and discusses the potential of using a reduced-size pan for real-time monitoring of water evaporation and precipitation, proposing an open-source irrigation decision support system. |
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| ISSN: | 2073-4395 |