Temperature series analysis of the Hirfanli Dam Basin with the Mann-Kendall and Sequential Mann-Kendall tests

Abstract

Global warming is a result of the greenhouse effect caused by the gases released into the atmosphere; It is usually expressed as an increase in the measured average temperatures. In addition to this, extreme weather events such as droughts, floods, and severe hurricanes become more frequent, and the specified extreme events become more severe. The effects of global climate change on hydrological and meteorological variables are increasing day by day. Therefore, hydro-meteorological parameters should be examined carefully. In this study, the effects of global climate change on the Hirfanli Dam Basin temperature series were investigated using the Mann-Kendall Test and Sequential Mann–Kendall Test. The annual mean temperature series of six stations recorded between 1965 and 2017 were analyzed and evaluated. It has been determined that the annual mean temperature has increased throughout the basin and significant increases started since the 1990s. Researches analysing the effects of global climate change on hydro-meteorological parameters related to the Hirfanli Dam Basin should be increased. These studies may be the investigation of the trends of climate parameters with different methods, as well as their relations with global atmospheric indices such as the North Atlantic Oscillation and Southern Oscillation. In the Hirfanlı Dam Basin, which shows semi-arid climate characteristics, especially drought disaster should be investigated. In addition to drought detection, these studies should be conducted with an integrated disaster management perspective in order to prepare for drought disasters. With the perspective of integrated disaster management, it will be more resilience to disasters with plans in which all components in the basin are together and effective against many disasters, especially drought.