by EFAS Hydrological Data Collection Centre

During the month of June, there were 76 stations with exceedances, many of which are located in Norway (25), Spain, and Sweden (nine stations each). In Norway, where all exceedances are related to the discharge threshold, one-in-three stations are mainly located in the Glomma river basin. The remainder of stations are distributed over 14 basins. In Sweden, exceedances are also related to discharge. However, in Spain we can find both types of exceedance: the Minho river basin has exceedances due to water level, the Llobregat basin due to discharge, and the Ebro river shows both types.

In addition, there is a considerable concentration of stations in Austria and Italy (seven stations each) and Bosnia and Herzegovina (six). Poland, Slovenia, and Ukraine each have more than one station exhibiting an exceedance this month.

In terms of river basins, the two main basins with values above the threshold are the Danube (18) and the aforementioned Glomma (eight). The exceedances in the Danube basin are spread over six different countries, but most of them are in Austria and Bosnia and Herzegovina. In the Po river basin in Italy, the number of stations with exceedances has decreased from 15 to six.

Regarding the stations that recorded values above the 90% quantile, 34 exceeded this threshold in June. Again, Spain has the highest number of exceedances. Spanish basins have 19 stations, with the Júcar river having the largest number (8). In the Iberian Peninsula, we find the Douro, Guadalhorce, and Guadalquivir basins, each with two stations recording values above the 90% quantile. Italy has four stations, followed by Slovenia with three stations exceeding this quantile. By basins, in addition to the aforementioned Jucar basin, the Danube river basin stands out with four stations. Other stations exceeded the 90% quantile value in Ukraine, Latvia, Austria, Estonia, Norway, and Luxembourg.

Finally, and according to the number of stations recording average values below the 10% quantile, the upward trend is maintained from last month, and we find an increase of more than 60%. In the month of June, there are 227 stations with average values below this cliff.

This month, Germany has the most stations (47), followed by Spain (27) and France (26). Poland has increased the number of stations below this quantile from nine to 21 this month.  Switzerland has 19 stations and Hungary and Ukraine have more than 10 stations each. Eleven more countries present stations with values below this quantile, notably Italy, Norway, Romania, Slovakia, Slovenia, and United Kingdom.

In terms of basins, the Danube river in France is the one with the highest number of stations (50). The Rhine basin has 41 stations with values below the 10% quantile. In total, as many as 42 different basins have values below this limit.