Geostatistical mapping of reference crop evapotranspiration (ETo)

Abstract

Usable natural water resources on the earth's surface are decreasing. The water mostly used in agriculture should be consumed as much as the plant needs and irrigation plans should be prepared for this. Reference Crop Evapotranspiration (ETo) can be estimated according to climatic conditions. The aim of this study is to estimate the Reference Crop Evapotranspiration of Mersin province using Penman Monteith method and produce its geostatistical map. For this, temperature, humidity, sunshine duration, wind speed and meteorological data of the month of May 2017-2020 of 28 meteorological stations provided from Mersin Provincial Directorate of Meteorology were used. The equation used in Penman Monteith method was written with buttons in MatLAB guide programming language and ETo values were calculated and estimated. Mersin province's reference crop evapotranspiration map was created as geostatistical by correlating the Eto values for the years 1 May 2017-2020 with each station and it was observed that the highest water requirement was found on May 1, 2018.