Irrigation water requirements as affected by diverse climate conditions

Rania A. Alkersh; Abdelghany M. El-Gindy; Ebtisam I. Eldardiry; Yasser E. Arafa

doi:10.53730/ijhs.v6nS2.6571

Authors

Rania A. Alkersh Water Relations and Field Irrigation Dept., National Research Centre, El-Behoos St., Dokki, Cairo, Egypt
Abdelghany M. El-Gindy Agricultural Engineering Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
Ebtisam I. Eldardiry Water Relations and Field Irrigation Dept., National Research Centre, El-Behoos St., Dokki, Cairo, Egypt
Yasser E. Arafa Agricultural Engineering Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt

Keywords:

climate change, evapotranspiration, Penman-Monteith, Blaney-Criddle

Abstract

Determination of crop water requirement is one of the key parameters for precise irrigation scheduling, especially under limited water resources, such as in Egypt. Hence, an accurate estimation of reference evapotranspiration (ETo) is a vital factor for agriculture production, therefore the objectives of the present study were to study the influence of climate change on different seasons and comparing of ETo estimations using Blany- Criddle (BC) and FAO-56 Penman-Monteith (PM) equations under present and future climatic conditions. Data on the present climate have been collected from Wadi El-Natrun meteorological station, Egypt from 1991 to 2020. While the future climate data have been chosen for the concerned RCPs scenarios: RCP2.6, RCP4.5, RCP6.0, and RCP8.5 in 2040, 2060, 2080, and 2100. The results revealed that all months’ reordered T_mean above 20 ^oC, except December, January, and February where they ranged between 17.68 and 19.44 ^oC. The highest T_mean values were observed in July (32.3^oC), August (31.9 ^oC), and June (31.8 ^oC), while February scored the lowest T_mean (17.7 ^oC).

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