KAZALCI OKOLJA

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Good

Nutrients, especially nitrogen and phosphorus compounds, are important for the growth of algae and higher plants, but in high concentrations can cause undesirable changes in aquatic organisms and seawater quality. Long-term measurements of selected nutrients in the Slovenian sea show that their concentrations have decreased significantly. Therefore, the ecological status of the Slovenian Sea is assessed as good to very good based on nutrients in recent years.

Bad

Trends in annual precipitation are not as obvious as temperature trends. Changes between years and regions are significant. According to the climate change projections, annual precipitation will slightly increase while changes in seasonal precipitation will be noticeable. The most worrying are summer conditions, because less precipitation and higher temperature might result in higher frequency of droughts. In winter, more precipitation may lead to an increase in flooding events.

Bad

Precipitation is highly variable in space and time, even more than temperature (storms and hail). In the last two decades, Slovenia is observing catastrophic droughts and abundant precipitation resulting in floods, sometimes drought and floods occur even within the same year. The maximum snow cover depth and the depth of fresh snow decreased in the period 1961-2011

Neutral

In the last decade, droughts have been slightly less intense than in the previous decade, and it is worrying that they occur most often during the growing season. Especially in the first trimester, we observe a decrease in the frequency and intensity of hydrological drought. In the period 1961–2019, the year 2003 stands out in terms of drought, which was dry in all quarters of the year. After 2000, the years 2007 and 2011 were more markedly dry.

Bad

Frequency and intensity of groundwater droughts is increasing in recent decades. 7 out of 10 years with highest annual intensity of phenomenon is classified in the period after year 2000. The highest intensity of groundwater drought was recorded in years 2012, 2002 and 2003. Regarding the duration of groundwater drought the period between years 2002 and 2004 stands out. Extreme groundwater drought most frequently occur in winter and spring while severe drought is most commonly observed in spring and summer.

Bad

The frequency of agricultural drought in Slovenia has been increasing in recent decades. In the last twenty years, we have recorded 6 droughts that affected Slovenia at the scale of a natural disaster. Drought is occurring with increasing intensity and in areas and seasons where there have been no problems in the past. An additional risk for agricultural drought are rapidly developing droughts in summer ("flash droughts"), which occur especially during heat waves. Projections show that trend of increasing frequency and intensity of agricultural drought will continue in the future.pp

Bad

Soil drought has a key impact on plant development and consequently on various industries (forestry, agriculture, …) . Indicators of the number of drought days and the duration of drought periods in individual years show an increase especially after 1990. Similarly, the analysis of the impact of the climate change up to 2100 shows that soil water deficits will increase in the future. The number and the duration of the droughts will increase.

Neutral

Water consumption in Slovenia represents a relatively small proportion of the annual gross water outflow from the country. In 2019, the annual WEI+ index was around 3%, and same 3% compared to the periodic average of water availability. The Long-term Annual Average Water Exploitation Index shows a slight decrease, but the trend is not statistically significant.

Neutral

In recent years, the amount of wastewater treated by secondary or tertiary treatment processes increased, while primary treatment processes have closed. The amount of wastewater treated through secondary treatment processes increased by 150 % since 2000 or from 30 million m3 (in 2000) to almoust 45 million m3 (in 2019). There were almost no tertiary wastewater treatment processes in Slovenia in 2000, and in 2019, 72% of wastewater or 113 million m3 of wastewater was treated by tertiary process.

Neutral

The above-average years 2013 and 2014 were followed by average and below-average annual runoff. In the period 1961 - 2019, the driest years were 2011, 2007, 2003, 1983, and 1971. In the year 2019 annual runoff was average. The long-term downward trend of river runoff from the territory of Slovenian currently persists


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