Drought analysis of Şırnak, Siirt, Hakkari and Van provinces with different methods

Due to the global warming and climate changes occurring in the world, the drought effect is increasing worldwide and many scientific studies are carried out on this subject. When we look at the studies conducted in our country, the drought effect is clearly seen. In this study, drought analysis of the provinces of Şırnak, Siirt, Hakkari and Van, which are neighboring each other and located in different geographical regions, was carried out with different methods. A total of 7 meteorological stations within the borders of these provinces were utilized and 3 different meteorological drought indices were calculated. Standardized Precipitation Index (SPI), Deciles Index(DI), Reconnaissance Drought Index(RDI) methods were used to determine the number of dry years and drought severity of the provinces by years. According to the results of 12-month periods analysis; all provinces and districts where all stations are located are affected by drought. In most of the stations, especially in the years after 2000, it was observed that the number of dry years was high and it was concluded that the number of dry years was generally higher than the number of humid years. In addition, it was determined that extreme and severe dry years were observed in all provinces and districts where the stations are located. Therefore, it was concluded that measures should be taken against extreme droughts that may occur in these places in the future.