KAZALCI OKOLJA

Key message
Neutral

2024 was the second consecutive year with above-average water abundance, with no surface water drought observed in any season. However, over the past twenty years, hydrological droughts of surface waters have become both more frequent and more intense compared to previous periods, with greater variability between individual years. Very dry and very wet years now alternate with periods of hydrologically normal conditions. The drought intensity during the growing season has become more frequent, though it has been less severe in the past decade than in the previous one. In the last decade, more intense drought conditions have primarily occurred in the first half of the year, especially between April and June, while in the second half, only in rare cases has normal drought been exceeded. From 1961 to 2024, 2003 stands out for its dryness, with drought conditions prevailing in all quarters. Following 2000, other notably dry years included 2007, 2011, and 2022.


Charts

Figure PP12-1: Yearly streamflow drought index for Slovenia, 1961-2024
Sources:

Slovenian Environment Agency, 2025 (7. 03. 2025)

Show data
Wet (wSDI >=0)[ -] Mild Drought (-1 <= wSDI < 0)[ -] Moderate Drought (-1.5 <= wSDI < -1)[ -] Severe Drought (-2 <= wSDI < -1.5)[ -] Extreme Drought (wSDI < -2)[ -]
1961 0.07 0 0 0 0
1962 1.06 0 0 0 0
1963 0.77 0 0 0 0
1964 0.39 0 0 0 0
1965 2.00 0 0 0 0
1966 0.55 0 0 0 0
1967 0 -0.15 0 0 0
1968 0 -0.06 0 0 0
1969 0.82 0 0 0 0
1970 0.71 0 0 0 0
1971 0 0 -1.00 0 0
1972 1.22 0 0 0 0
1973 0 -0.48 0 0 0
1974 0.36 0 0 0 0
1975 0.13 0 0 0 0
1976 0.03 0 0 0 0
1977 0.28 0 0 0 0
1978 0.12 0 0 0 0
1979 1.06 0 0 0 0
1980 0.80 0 0 0 0
1981 0 -0.50 0 0 0
1982 0.38 0 0 0 0
1983 0 0 -1.50 0 0
1984 0.41 0 0 0 0
1985 0.12 0 0 0 0
1986 0.06 0 0 0 0
1987 0.68 0 0 0 0
1988 0 -0.40 0 0 0
1989 0 -0.55 0 0 0
1990 0 -0.21 0 0 0
1991 0.26 0 0 0 0
1992 0.02 0 0 0 0
1993 0 -0.67 0 0 0
1994 0 -0.33 0 0 0
1995 0.49 0 0 0 0
1996 0.93 0 0 0 0
1997 0 -0.68 0 0 0
1998 0.12 0 0 0 0
1999 0.09 0 0 0 0
2000 0 -0.29 0 0 0
2001 0 -0.26 0 0 0
2002 0 -0.71 0 0 0
2003 0 0 0 0 -2.38
2004 0.43 0 0 0 0
2005 0 -0.35 0 0 0
2006 0 -0.57 0 0 0
2007 0 0 -1.28 0 0
2008 0 -0.04 0 0 0
2009 0.22 0 0 0 0
2010 1.24 0 0 0 0
2011 0 0 0 0 -2.18
2012 0 -0.64 0 0 0
2013 0.97 0 0 0 0
2014 1.93 0 0 0 0
2015 0 0 -1.10 0 0
2016 0.25 0 0 0 0
2017 0 -0.13 0 0 0
2018 0 -0.04 0 0 0
2019 0 -0.07 0 0 0
2020 0 -0.82 0 0 0
2021 0 -0.50 0 0 0
2022 0 0 0 -1.51 0
2023 1.24 0 0 0 0
2024 0.22 0 0 0 0
Figure PP12-2: Half-year streamflow drought index for Slovenia - the period from April to September, 1961-2024
Sources:

Slovenian Environment Agency, 2025 (7. 03. 2025)

Show data
Wet (wSDI >=0)[ -] Mild Drought (-1.0 <= wSDI < 0)[ -] Moderate Drought (-1.5 <= wSDI < -1.0)[ -] Severe Drought (-2 <= wSDI < -1.5)[ -] Extreme Drought (wSDI < -2)[ -]
1961 0.02 0 0 0 0
1962 0.99 0 0 0 0
1963 0.73 0 0 0 0
1964 0 -0.18 0 0 0
1965 1.98 0 0 0 0
1966 0.17 0 0 0 0
1967 0.26 0 0 0 0
1968 0.14 0 0 0 0
1969 1.07 0 0 0 0
1970 1.05 0 0 0 0
1971 0 -0.68 0 0 0
1972 1.53 0 0 0 0
1973 0 -0.08 0 0 0
1974 0.32 0 0 0 0
1975 1.10 0 0 0 0
1976 0.15 0 0 0 0
1977 0.23 0 0 0 0
1978 0.71 0 0 0 0
1979 0.19 0 0 0 0
1980 0.30 0 0 0 0
1981 0 -0.10 0 0 0
1982 0 -0.08 0 0 0
1983 0 0 -1.07 0 0
1984 0.81 0 0 0 0
1985 0.55 0 0 0 0
1986 0.78 0 0 0 0
1987 0.55 0 0 0 0
1988 0.27 0 0 0 0
1989 0.74 0 0 0 0
1990 0 -0.28 0 0 0
1991 0.34 0 0 0 0
1992 0 -0.86 0 0 0
1993 0 0 0 -1.67 0
1994 0.01 0 0 0 0
1995 0.57 0 0 0 0
1996 0.81 0 0 0 0
1997 0 -0.89 0 0 0
1998 0.25 0 0 0 0
1999 0.49 0 0 0 0
2000 0 0 0 -1.68 0
2001 0 -0.30 0 0 0
2002 0 -0.54 0 0 0
2003 0 0 0 0 -2.79
2004 0.41 0 0 0 0
2005 0.40 0 0 0 0
2006 0.11 0 0 0 0
2007 0 0 -1.37 0 0
2008 0.13 0 0 0 0
2009 0 -0.10 0 0 0
2010 0.62 0 0 0 0
2011 0 0 0 -1.72 0
2012 0 0 -1.12 0 0
2013 0.40 0 0 0 0
2014 0.87 0 0 0 0
2015 0 -0.91 0 0 0
2016 0 -0.48 0 0 0
2017 0 -0.35 0 0 0
2018 0 -0.32 0 0 0
2019 0 -0.20 0 0 0
2020 0 0 -1.01 0 0
2021 0 -0.37 0 0 0
2022 0 0 -1.16 0 0
2023 0.88 0 0 0 0
2024 0.27 0 0 0 0

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