Evapotranspiration analysis of North Cyprus

Koyuncu, Berkay
Water is one of the first essentials to consider when the “sustainability” term comes to order. Especially the significance of potable water is highly critical corresponding to the allocation of available water on the Earth. Groundwater is the optimum option when it is compared with other resources to contribute potable water without any advanced treatment process. In North Cyprus, precipitations can be considered as the main (and almost only) feeder for groundwater resources; therefore, evapotranspiration parameter is vital for the sustainability of those resources. In this study, evapotranspiration (ET) of Northern Cyprus including the surface area of Guzelyurt Aquifer which is the largest fresh water resource in the island was analyzed. Before main tasks, quality control stages of raw data such as unexpected value detection, distribution fittings, outlier tests, and homogeneity analysis was completed. Data analysis section before further calculations is quite significant for reliability of the study results. For North Cyprus, evapotranspiration is the major natural water loss in the water balance of the country, moreover, it was estimated by using the different evapotranspiration methods according to the available data. Thirty-seven-year long daily data are available for temperature and precipitation from 33 meteorological stations. For estimation of evapotranspiration, five methods were selected for comparison among applicable methods for North Cyprus in the literature due to implementation ease and accuracy. Thornthwaite and Hamon methods which are temperature based and Solar Radiation-Based, Blaney-Criddle, and Hargreaves methods which are radiation based are employed. Different ET Mapping applications by using Geographical Information Systems (GIS) was provided after calculation of single ET values for every station as annually, seasonally, and monthly. Results have showed that most of the months have negative balance; however, December, January, and February has positive balance for the water-budget of the North Cyprus. As the last step of the thesis, trend analysis of Potential Evapotranspiration has been completed in order to see if there is any statistically significant change in time-series.


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Citation Formats
B. Koyuncu, “Evapotranspiration analysis of North Cyprus,” M.S. - Master of Science, Middle East Technical University, 2019.