by EFAS Hydrological Data Collection Centre 

During the month of September, there were 80 stations with exceedances, almost four times less than the previous month. Most of them are located in Italy (31 stations), related to the water level variable. In Norway, there are 18 stations with exceedances and in Spain and Germany, there are eight stations each.

In addition, there are four stations in Austria and Croatia and three in Slovenia. The following countries have recorded one station with exceedances this month: Switzerland, Belgium, Hungary, and Iceland.

As for the river basins, the main river basin with values above the threshold this month is the Po River, with 32 stations in two different countries, with Italia standing out. The Danube River in five countries is the next river basin with the highest number of stations (18), followed by the Glomma River basin with 3 stations showing exceedances. A total of 26 different river basins have exceedances in September.

In terms of stations that recorded values of mean discharge above the 90% quantile, 114 exceeded this threshold this month. In September, Spain was the country with the most stations in this situation: 36. Norway, with 20 stations, and the United Kingdom with 17, are the countries with the next highest number of stations in this situation. The Spanish stations are distributed in ten different river basins, highlighting the Ebro River with 18 stations exceeding this quantile. In Norway, there are seven basins affected while in the United Kingdom, we find five basins affected. In Ireland, nine stations have values above this quantile. In Finland, seven stations exceed this cliff. Other stations exceed the 90% quantile value in up to 17 countries.

By river basin, the aforementioned Ebro River stands out with 18 stations above the 90% quantile. The  Thames River basin (United Kingdom) is the second with the highest number of stations over this cliff, showing 12 stations in this situation and followed by the Glomma river basin (Norway) with 10. A total of 49 different river basins have exceedances over the 90% quantile in September.

Finally, and according to the number of stations recording mean values below the 10% quantile, in September, there were 71 stations with average values below this cliff in 13 different countries.

This month, France is the country with most of the stations (25), followed by Spain with 16 stations and Poland with 15 stations. Germany and Ukraine have three stations with values below this threshold. With two stations we find Romania and Bulgaria. Another five countries show one station each in this situation.

In terms of river basin, this month the Rhine River is the one with the highest number of cases, with 11 stations with an average discharge below the 10% quantile. The Loire River has 9 stations, and the Vistula and Ebro rivers have nine stations each in the same situation. In total, as many as 18 different basins have values below this limit in Europe.