Monthly maps for discharge anomalies and Lowest alert level exceedance with a summary of the monthly hydrological situation.


Hydrological situation for June 2023

Figure 1. Exceedance of lowest discharge threshold level for June 2023
Figure 1. Exceedance of lowest discharge threshold level for June 2023
Figure 2. Exceedance of lowest water level threshold level for June 2023.
Figure 2. Exceedance of lowest water level threshold level for June 2023.
Figure 3. Classification of stations according to discharge historical data average percentile ranges for June 2023.
Figure 3. Classification of stations according to discharge historical data average percentile ranges for June 2023.

by EFAS Hydrological Data Collection Centre 

During the month of June, there were 121 stations with exceedances, which is half than the previous month. The majority of stations are in Italy (25) and Serbia (21), mainly related to water level. In Spain there are 16 stations, and in Bosnia and Herzegovina and Croatia there are 12 stations with exceedances. 

In addition, there are five stations in Ukraine and Hungary, four stations with exceedance in Iceland, Austria, Slovakia, and Romania and three stations in Norway. Several countries have recorded one station with exceedances this month: Switzerland, Germany, Sweden, Belgium, Slovenia, and Kosovo*.

As for the river basins, the main river basin with values above the threshold is again the Danube, with 63 stations in ten different countries, with Serbia, Croatia, and Bosnia and Herzegovina standing out with 21 the first and 11 exceedances the latter. The Po River in Italy is the next river basin with the highest number of stations (20), followed by the Llobregat River with five stations with exceedances. A total of 58 different river basins have exceedances in June.

In terms of the stations that recorded values of mean discharge above the 90% quantile, 98 exceeded this threshold this month. In June, Spain (28) was the country with the most stations in this situation. Serbia (26), and Slovenia (10), are the countries with the next highest number of stations. The Spanish stations are distributed in 11 different basins, highlighting the Ebro River, with seven stations in this situation. In Serbia, only the Danube basin is affected while in Slovenia we find three basins, highlighting the Danube again. In Croatia, six stations show values above this quantile. In Bulgaria and England, five stations exceed this cliff. Other stations exceed the 90% quantile value in up to 16 countries.

By river basin, it is the Danube River that stands out with 51 stations above the 90% quantile. The aforementioned Ebro river basin is the second with the highest number of stations over this cliff, showing seven stations in this situation and followed by the Minho and Guadiana river basins with 5. A total of 27 different river basins have exceedances over the 90% quantile in June.

Finally, and according to the number of stations recording mean values below the 10% quantile, in June there were 136 stations with average values below this cliff, across 15 different countries.

This month, Germany is the country with the most stations (41), followed by Spain (19). Switzerland has 17 stations with values below this threshold. With 16 stations we find France, and Poland with 11. Another ten countries show less than ten station each in this situation.

In terms of river basin, this month the Rhine is the river with the highest number of cases, with 37 stations with an average discharge below the 10% quantile. The Danube River has 17 stations, and Elba river has 10 stations in the same situation. In total, as many as 38 different basins have values below this limit in Europe.

*This designation is without prejudice to positions on status and is in line with UNSCR 1244/1999 and the ICJ Opinion on the Kosovo declaration of independence.