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  • Application of streamflow drought index (SDI) for determining drought events on the Sava river [Elektronski vir]
    Leščešen, Igor ...
    In the summer of 2022, the world experienced an extended and pronounced drought, which resulted in several negative impacts, including energy shortages and food insecurity. Although drought is a ... natural phenomenon in the water cycle, record-breaking minimum river f lows have been observed over the last few decades. Therefore, quantifying drought and wet events is essential for managing water resources, engineering, and planning. This study aims to evaluate hydrological drought conditions in the Sava River catchment by using the streamf low drought index (SDI) at six stations from 1961 to 2020. We have analysed data at annual sale and at cold half-year (October-March) and warm half-year (April-September). The results of the study showed that the longest dry period lasted for three years, occurring between 1981- 1984, based on the annual scale analysis. The most severe drought occurred in 2011-2012, with an average SDI value of -2.48. Moreover, 75% of droughts with an SDI value lower than -1 occurred after the year 2000, indicating a trend of increasing drought severity. The nonparametric Mann-Kendall test was employed to identify trends in drought occurrence, and it revealed that two out of six stations showed a significant increase in drought severity during the investigated period. The seasonal SDI during cold half year showed that there was no significant trend. In contrast, all stations experienced a statistically significant increase in drought events during the warm half-year, indicating that hydrological droughts are becoming more severe during the warmer months. The most severe summer drought occurred during 2002-2003, with an SDI value of -2.75. Furthermore, 60% of droughts with values below -1 occurred after 2000 during this season. In conclusion, the study highlights the need for continuous monitoring and evaluation of hydrological drought conditions to minimize the impact of droughts on human society and the environment.
    Vir: Abstract book [Elektronski vir] (Str. 15)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 158452739

    Povezava(-e):

    https://wbc-rti.info/object/event/23679

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