REFERENCE EVAPOTRANSPIRATION BORDERS MAPS OF EGYPT BASED ON KRIGING SPATIAL STATISTICS METHOD

Authors

  • Mohammed A. El-Shirbeny
  • Bassam Abdellatif

Keywords:

Modeled data, Agricultural planning, GIS, Water management and Arid climate

Abstract

The main idea of this research depends on defining and mapping the borders of minimum and
maximum reference Evapotranspiration (ETo) on a spatial and temporal basis (over the period from 1979 to
2014 in every region in Egypt). Acceptable results could be achieved through using appropriate equation
adjusted to local conditions to calculate ETo. These results should help the Egyptian government and policy
makers to identify priorities for agricultural land reclamation, where the most important limiting factor in
Egypt, for the agricultural sector, is water. Estimation of ETo according to FAO-Penman-Monteith (FPM)
method depends on Location, Elevation, Temperature, solar radiation (sun shining hours), relative humidity
(RH) and wind speed which are mandatory parameters to calculate ETo. Although the scarcity of climate data
is a major problem in most developing countries, the climatic mathematical models are considered as the best
solution for none or rare climatic database regions. These models depend on many parameters which can be
derived from the remotely sensed data. The modeled data must be evaluated and calibrated with a measured
data. The modeled Tmax, Tmin and Rad were validated with measured data with R2 as high as 0.97, 0.85 and
0.95 respectively. The R2 between obtained ETo from measured data and the resulted ETo from modeled data
was 0.9. The resulted linear equation was used to calibrate the results of ETo from modeled data. Kirigingspatial-statistics method (KSS) was used to generate spatial surface maps of ETo. Monthly minimum,
maximum and mean ETo maps were produced using KSS method.

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Published

2017-03-15

How to Cite

Mohammed A. El-Shirbeny, & Bassam Abdellatif. (2017). REFERENCE EVAPOTRANSPIRATION BORDERS MAPS OF EGYPT BASED ON KRIGING SPATIAL STATISTICS METHOD. GEOMATE Journal, 13(37), 1–8. Retrieved from https://geomatejournal.com/geomate/article/view/1496

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