Drought is a catastrophic natural event that might result from climate change. Drought reduces water availability, having a substantial influence on water resources management. It differs from other natural disasters due to its gradual accumulation and undefined expected duration. To characterize streamflow drought, an evaluation of hydrological drought on the Topľa River is conducted. The hydrological years from 1988 to 2020 were analyzed statistically for drought using the water-bearing coefficient method and the streamflow drought index (SDI). Four separate reference periods were evaluated using SDI to determine the impact of seasonality on the Topľa river’s hydrological state whereas the majority of Slovak rivers have a period or two of low flow throughout the summer, autumn, and, in some circumstances, winter. There is a minor difference in drought classification between both indices, with 19 and 18 hydrological years categorized as dry over the research period, according to the SDI and water-bearing coefficient, respectively. Based on the findings of this study, there are no significant differences between utilizing SDI or water-bearing coefficient in drought analysis, except for the handling of critical values.

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