Comparison of the meteorological drought indices according to the parameter(s) used in the Southeastern Anatolia Region, Turkey

Year 2021, , 230 - 243, 30.09.2021

Gözde Nur Akşan , Ülker Güner Bacanlı

https://doi.org/10.35208/ert.912990

Cited By: 5

Abstract

Southeast Anatolia Region, where Turkey's summer-winter differences were experienced as a region, was preferred in this study. Daily precipitation and daily temperature data for the 1950-2019 period were provided for analysis. However, due to data deficiencies, Adiyaman, Batman and Kilis stations were worked in the 1959-2019 period and Sirnak station in the 2000-2019 period. All data have been tested for homogeneity.

According to the parameters used in this study, comparisons were made between the indices. It is divided into 4 according to the parameters used. Although the parameter used is the same, each index has drawn different results due to time differences. Dry results were obtained across the entire station from the methodology of the EDI (as used daily rainfall data). In addition, due to the low precipitation in the index, dry results were obtained in the RAI. Normal results were obtained with other precipitation-based drought indices.

According to EDDI results, the driest month is April. During the 12-month seasonal period, only 5 months have passed in the form of no drought.

According to SPEI and RDI values, normal results were achieved at all stations. Moderately and severely dry conditions sometimes occur, extremely dry have rarely been seen. RDI has been identified to have a more drought duration than SPEI.

According to PCI and HTC (based on precipitation and temperature), EDI and RAI results (precipitation-based), the region is dominated by drought. When viewed on a station-by-station basis, drought has been observed at stations in the borders.

Keywords

Drought, Precipitation, Temperature, Potential Evapotranspiration (PET), Southeastern Anatolia Region

Supporting Institution

BAP

Project Number

2020FEBE038

Thanks

This paper is also one of the preliminary researches of our project “Türkiye'de Yağışa Dayalı Kuraklık Analizi”, financed by PAU Scientific Research Project Funds.

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