by EFAS Hydrological Data Collection Centre

During the month of November, there were 119 stations with exceedances, which is twice as many as in the previous month. The majority of stations wirh exceedances are in Spain (21), Norway (20) and all of them with exceedances related with discharge, compared to Italy (18) where exceedances are related to the water level threshold, in the north and center of the country. In Croatia, the water level threshold was also exceeded at 17 stations.

In addition, there are 11 stations in Bosnia and Herzegovina and nine in Ireland. Several countries have exceedances this month in minor size: Serbia (five), Slovenia (four), Germany and Iceland (three), Poland (two) and only one station with values above the threshold on Ukraine, Romania, Hungary, Sweden, Belgium and Kosovo.

As for the river basins, the main one with values above the threshold is again the Danube, with 37 stations in seven different countries, standing out Croatia and Bosnia-Herzegovina. The Minho River in Spain, is the next basin with the highest number of stations, nine in this case. Italian basins: Garigliano, Po and Tiber, together with the Spanish Turia, are the other basins with more than two stations exceeding the thresholds.

In terms of the stations that recorded values above the 90% quantile, 94 exceeded this threshold in November. As with the exceedance, Norway is the country with the most stations in this situation (38). Spain is the country with the second highest number of stations. The Spanish basins have 16 stations. In Ireland, 11 stations show values above this quantile. In Serbia there are seven stations that exceed this cliff, six in Ukraine, and five in Iceland. Other stations exceed the 90% quantile value in United Kingdom, Croatia, Romania, Switzerland, France, and Italy.

By river basin, it is the Glomma River (in Norway) the one that stands out with 11 stations. The Danube River shows exceedances across four countries, being in Serbia the highest number of stations (six). The Drammen (Norway) and Dniepper (Ukraine) have seven and five stations respectively. A sum of 48 different river basins show exceedance over the 90% quantile.

Finally, and according to the number of stations recording average values below the 10% quantile, we can find an increase of around 40%. In the month of November, there are 108 stations with average values below this cliff, which affected 20 different countries.

This month, Spain and France are the countries with the most stations (19 each), followed by Poland with 14 stations. Germany has nine stations with values below this threshold, followed by Hungary with eight stations.

In terms of river basin, this month the Danube is the river with the highest number of cases, with 26 stations with an average discharge below the 10% quantile. The Oder River, in Germany and Poland, has 11 stations in the same situation. The Ebro River in Spain and the Loire River in France have ten and nine stations under this cliff. In total, as many as 34 different basins have values below this limit.