DROUGHT ANALYSIS FOR SIVAS PROVINCE USING STANDARDIZED PRECIPITATION INDEX

Abstract

Author(s): Murat KARABULUT

Drought is a normal and recurrent feature of the any climate and happens in all climatic regions, but its characteristics vary substantially from region to region. Because of its environmental and socio-economic results, it is one of the most important natural events to focus on. Central Anatolia region, is one of the sensitive to precipitation changes, including drought conditions in Turkey. In this study, drought events in various time scales (1, 3, 6, 12 months) were examined in Sivas Province in the Central Anatolian region during the period 1964-2018. Standardized Precipitation Index (SP?) and cumulative deviation curve methods were used to assess drought conditions. The results revealed that moist and dry periods show a cyclical character in the study area. However, it has recently been determined that dry conditions tend to increase in their frequencies. Analyzes of precipitation series used in this study show that long-term and frequent drought events are encountered for the recording period in which the precipitation characteristics of the region are taken into consideration. It is understood that although there is a slight decrease in annual precipitation totals in a part of the research area, the precipitation pattern has changed. Cumulative deviation and SP? results reveal that a significant number of arid periods were experienced in Sivas Province in the 1964-2018 period. According to these results, precipitation has decreased in all stations in the last ten years.

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