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All Journal Indonesian Journal of Electrical Engineering and Informatics (IJEEI)
Phaitoon Srinil
Faculty of Science and Arts, Burapha University, Chanthaburi
Computer Science & IT Electrical & Electronics Engineering

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Forecasting Irrigation Shifts in Fruit Cultivation Under Climate Change Scenarios in Tropical Thailand Pattharaporn Thongnim; Jakkrapan Sreekajon; Phaitoon Srinil
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol 14, No 3: September 2026
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52549/ijeei.v14i3.7302

Abstract

Irrigation management in tropical fruit orchards is most difficult during the tran- sition from the dry to the wet season, when atmospheric demand is high and rain- fall is erratic. This study presents a web-based decision-support framework that converts hourly meteorological records into irrigation requirements and evalu- ates how they shift under climate perturbation. Vapor pressure deficit (VPD) and hourly reference evapotranspiration (ETo) are computed with the FAO-56 Penman-Monteith equation, scaled by stage-specific crop coefficients and con- verted to a per-tree volume using canopy radius. The implementation reproduces the worked hourly values of FAO-56 Example 19 exactly. For a representative day in Chanthaburi, Thailand, the net requirement for durian rose from 3.53 to 7.05 liters per day for a tree of 1.0 m canopy radius under a perturbation of +2 ◦C and −20% relative humidity. Because this result depends on how hu- midity is assumed to respond to warming, the calculation was repeated under three assumptions which gave increases in mean VPD of between 12.1 and 69.9 percent and in ETo of between 4.8 and 20.4 percent. The direction of the shift is therefore robust while its magnitude is assumption-dependent and irrigation requirements are reported as a range rather than a single value.
Forecasting Irrigation Shifts in Fruit Cultivation Under Climate Change Scenarios in Tropical Thailand Pattharaporn Thongnim; Jakkrapan Sreekajon; Phaitoon Srinil
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol. 14 No. 3: September 2026
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52549/ijeei.v14i3.7302

Abstract

Irrigation management in tropical fruit orchards is most difficult during the tran- sition from the dry to the wet season, when atmospheric demand is high and rain- fall is erratic. This study presents a web-based decision-support framework that converts hourly meteorological records into irrigation requirements and evalu- ates how they shift under climate perturbation. Vapor pressure deficit (VPD) and hourly reference evapotranspiration (ETo) are computed with the FAO-56 Penman-Monteith equation, scaled by stage-specific crop coefficients and con- verted to a per-tree volume using canopy radius. The implementation reproduces the worked hourly values of FAO-56 Example 19 exactly. For a representative day in Chanthaburi, Thailand, the net requirement for durian rose from 3.53 to 7.05 liters per day for a tree of 1.0 m canopy radius under a perturbation of +2 ◦C and −20% relative humidity. Because this result depends on how hu- midity is assumed to respond to warming, the calculation was repeated under three assumptions which gave increases in mean VPD of between 12.1 and 69.9 percent and in ETo of between 4.8 and 20.4 percent. The direction of the shift is therefore robust while its magnitude is assumption-dependent and irrigation requirements are reported as a range rather than a single value.
Co-Authors Jakkrapan Sreekajon Pattharaporn Thongnim