DETERMINATION OF THE TREND DIRECTIONS OF TEMPERATURE, PRECIPITATION, EVAPORATION AND FLOW DATA OF THE KIZILIRMAK BASIN

Abstract

The research area is the Kızılırmak Basin and the time series changes of average temperature, total precipitation, evaporation, and flow parameters measured at 8 meteorological stations and 13 DSİ stations in the basin were analyzed. The study aims to analyze the trends in climate parameters and current values by taking into account the annual measurements of meteorological stations that have been measuring throughout the basin for many years. Mann-Kendall and Spearman Rho tests, which are trend methods, were applied in the study. According to the results of the analyses, statistically significant increases were found in annual average temperatures throughout the basin. In precipitation values, a non-significant increase was observed in Kırıkkale, while non-significant decreases were detected in all remaining stations. When the evaporation values are analyzed, a non-significant decrease is observed in the Kastamonu station, while an increase is observed in the remaining stations, but it does not express significance. When the flow values are analyzed, increases are observed at Kanak Stream - Kaleboğazı and Kızılırmak N. - Bulakbaşı stations. While the increase at Kale Boğaz shows significance, the increase at Bulakbaşı station does not show significance.