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J. Imaging 2017, 3(3), 30;

Using SEBAL to Investigate How Variations in Climate Impact on Crop Evapotranspiration

Department of Rural Development, Agricultural Research Institute of Cyprus, 1516 Nicosia, Cyprus
Department Agricultural Economics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Alexander Technological Educational Institute of Thessaloniki, 57400 Thessaloniki, Greece
Remote Sensing and Geo-Environment Laboratory, Eratosthenes Research Centre, Department of Civil Engineering and Geomatics, Cyprus University of Technology, Saripolou 2-8, 3603 Limassol, Cyprus
Author to whom correspondence should be addressed.
Received: 27 April 2017 / Revised: 3 July 2017 / Accepted: 5 July 2017 / Published: 20 July 2017
(This article belongs to the Special Issue Remote and Proximal Sensing Applications in Agriculture)
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Water allocation to crops, and especially to the most water intensive ones, has always been of great importance in agricultural processes. Deficit or excessive irrigation could create either crop health-related problems or water over-consumption, respectively. The latter could lead to groundwater depletion and deterioration of its quality through deep percolation of agrichemical residuals. In this context, and under the current conditions where Cyprus is facing effects of possible climate changes, the purpose of this study seeks to estimate the needed crop water requirements of the past (1995–2004) and the corresponding ones of the present (2005–2015) in order to test if there were any significant changes regarding the crop water requirements of the most water-intensive trees in Cyprus. The Mediterranean region has been identified as the region that will suffer the most from variations of climate. Thus the paper refers to effects of these variations on crop evapotranspiration (ETc) using remotely-sensed data from Landsat TM/ETM+/OLI employing a sound methodology used worldwide, the Surface Energy Balance Algorithm for Land (SEBAL). Though the general feeling is that of changes on climate will consequently affect ETc, our results indicate that there is no significant effect of climate variation on crop evapotranspiration, despite the fact that some climatic factors have changed. Applying Student’s t-test, the mean values for the most water-intensive trees in Cyprus of the 1994–2004 decade have shown no statistical difference from the mean values of 2005–2015 for all the cases, concluding that the climate change taking place in the past decades in Cyprus have either not affected the crop evapotranspiration or the crops have managed to adapt to the new environmental conditions through time. View Full-Text
Keywords: climate change; evapotranspiration; SEBAL; algorithms; irrigation management climate change; evapotranspiration; SEBAL; algorithms; irrigation management

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Papadavid, G.; Neocleous, D.; Kountios, G.; Markou, M.; Michailidis, A.; Ragkos, A.; Hadjimitsis, D. Using SEBAL to Investigate How Variations in Climate Impact on Crop Evapotranspiration. J. Imaging 2017, 3, 30.

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