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Drought Investigation Using SPI and SPEI Methods: A Case Study in Kirikkale
(Kirikkale Üniversitesi, 2022) Aktürk, Gaye; Zeybekoglu, Utku; Yildiz, Osman
Drought is one of the most important natural disasters with various social and environmental effects. Therefore, it is very important to choose a particularly suitable index for monitoring drought. Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspiration Index (SPEI) are widely used in drought monitoring. In this study, drought analysis was carried out using SPI and SPEI methods in order to examine the development and characteristics of drought in the city of Kirikkale, which has semi-arid characteristics. SPI and SPEI values were calculated on 1, 3, 6, 9 and 12-month time scales by using monthly precipitation and temperature data from Kirikkale meteorology station between 1963 and 2018. While calculating the potential evapotranspiration (PET) values in the SPEI calculation, Thornthwaite and Hargreaves models were used and two different SPEI values were obtained. As a result, high correlation values were obtained between all indices in the same time scale. It has been concluded that SPI and SPEI methods are applicable in the detection and monitoring of drought in the study area.