Frequency of groundwater drought is increasing in recent decades in alluvial aquifers. 8 out of 10 years with highest intensity of groundwater drought in period 1981-2022 occurred after year 2000. Groundwater droughts with higher intensity is characteristic for winter while milder groundwater droughts mostly occur at the end of the summer and at the beginning of autumn. Groundwater drought intensity is also increasing seasonally with time between June and September when groundwater use is pronounced.
Hydrologic database ARSO, Slovenian Environment Agency, 2023
Hydrologic database ARSO, Slovenian Environment Agency, 2023
Extremely dry (SGI <-2)[%] | Severely dry (-2 <SGI <-1.5)[%] | Moderately dry (-1.5 <SGI <-1)[%] | Mildly dry ( (-1 < SGI < 0)[%] | |
---|---|---|---|---|
1981 | 1.06 | 4.26 | 8.51 | 24.47 |
1982 | 1.96 | 2.94 | 6.86 | 25.49 |
1983 | 5.83 | 8.33 | 16.67 | 22.50 |
1984 | 0 | 3.92 | 9.80 | 23.53 |
1985 | 1.59 | 4.76 | 11.90 | 20.63 |
1986 | 0 | 1.63 | 8.94 | 20.33 |
1987 | 0.92 | 0.92 | 10.09 | 21.10 |
1988 | 1.05 | 2.11 | 10.53 | 26.32 |
1989 | 2.44 | 8.94 | 17.07 | 21.95 |
1990 | 0.93 | 3.70 | 14.81 | 28.70 |
1991 | 0.91 | 1.82 | 2.73 | 22.73 |
1992 | 0 | 2.75 | 19.27 | 27.52 |
1993 | 2.31 | 15.38 | 23.08 | 23.85 |
1994 | 0 | 1.06 | 5.32 | 27.66 |
1995 | 0.81 | 1.61 | 6.45 | 21.77 |
1996 | 0 | 1.04 | 1.04 | 11.46 |
1997 | 1.05 | 7.37 | 20 | 32.63 |
1998 | 0 | 3.42 | 14.38 | 21.23 |
1999 | 0 | 1.72 | 7.76 | 18.97 |
2000 | 0 | 4.17 | 22.92 | 31.25 |
2001 | 1.69 | 11.02 | 15.25 | 26.27 |
2002 | 6.48 | 20.37 | 21.30 | 23.15 |
2003 | 8.33 | 24.07 | 26.85 | 25.93 |
2004 | 4.27 | 8.55 | 11.11 | 24.79 |
2005 | 0 | 1.59 | 12.70 | 24.60 |
2006 | 3.03 | 6.06 | 15.91 | 21.97 |
2007 | 3.85 | 7.69 | 23.08 | 29.81 |
2008 | 0 | 1.05 | 10.53 | 32.63 |
2009 | 0.81 | 1.63 | 9.76 | 21.14 |
2010 | 0 | 0 | 6.67 | 22.86 |
2011 | 1.60 | 10.40 | 22.40 | 24.80 |
2012 | 4.88 | 18.70 | 23.58 | 23.58 |
2013 | 0 | 2.11 | 7.04 | 19.01 |
2014 | 0 | 0 | 0 | 15.56 |
2015 | 0 | 3.19 | 12.77 | 29.79 |
2016 | 0 | 3.06 | 14.29 | 30.61 |
2017 | 0.91 | 8.18 | 20 | 28.18 |
2018 | 0.78 | 2.33 | 9.30 | 22.48 |
2019 | 1.87 | 8.41 | 20.56 | 28.97 |
2020 | 1.77 | 9.73 | 20.35 | 27.43 |
2021 | 0 | 5.26 | 15.79 | 27.19 |
2022 | 8 | 17 | 25 | 25 |
Hydrologic database ARSO, Slovenian Environment Agency, 2023
Extremely dry (SGI <-2)[%] | Severely dry (-2 <SGI <-1.5)[%] | Moderately dry (-1.5 <SGI <-1)[%] | Mildly dry ( (-1 < SGI < 0)[%] | |
---|---|---|---|---|
1981 | 2.08 | 2.08 | 4.17 | 22.92 |
1982 | 0 | 0 | 5.56 | 40.74 |
1983 | 0 | 5.88 | 17.65 | 43.14 |
1984 | 0 | 1.75 | 1.75 | 24.56 |
1985 | 0 | 1.27 | 5.06 | 22.78 |
1986 | 0 | 1.33 | 0 | 18.67 |
1987 | 0 | 0 | 4.69 | 18.75 |
1988 | 0 | 0 | 3.64 | 27.27 |
1989 | 0 | 0 | 0 | 20.90 |
1990 | 0 | 0 | 5.08 | 42.37 |
1991 | 0 | 0 | 2.70 | 21.62 |
1992 | 0 | 3.13 | 25 | 45.31 |
1993 | 5.26 | 28.07 | 40.35 | 22.81 |
1994 | 0 | 0 | 3.64 | 38.18 |
1995 | 0 | 0 | 0 | 14.29 |
1996 | 0 | 0 | 0 | 7.94 |
1997 | 0 | 1.96 | 3.92 | 52.94 |
1998 | 0 | 3.95 | 18.42 | 34.21 |
1999 | 0 | 0 | 0 | 13.16 |
2000 | 0 | 6.67 | 35.56 | 53.33 |
2001 | 0 | 0 | 8.93 | 46.43 |
2002 | 0 | 9.23 | 18.46 | 32.31 |
2003 | 9.43 | 37.74 | 39.62 | 9.43 |
2004 | 0 | 0 | 2.99 | 37.31 |
2005 | 0 | 0 | 1.12 | 30.34 |
2006 | 0 | 1.54 | 1.54 | 24.62 |
2007 | 3.51 | 7.02 | 29.82 | 42.11 |
2008 | 0 | 0 | 3.08 | 23.08 |
2009 | 0 | 1.32 | 1.32 | 18.42 |
2010 | 0 | 0 | 10.77 | 30.77 |
2011 | 0 | 0 | 13.33 | 62.22 |
2012 | 0 | 20 | 32.73 | 32.73 |
2013 | 0 | 3.90 | 6.49 | 27.27 |
2014 | 0 | 0 | 0 | 18.18 |
2015 | 0 | 0 | 8.33 | 41.67 |
2016 | 0 | 0 | 3.70 | 44.44 |
2017 | 1.47 | 7.35 | 25 | 41.18 |
2018 | 0 | 0 | 1.39 | 22.22 |
2019 | 0 | 1.54 | 9.23 | 36.92 |
2020 | 1.56 | 9.38 | 14.06 | 34.38 |
2021 | 0 | 0 | 7.14 | 42.86 |
2022 | 13.56 | 16.95 | 28.81 | 32.20 |
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