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


Hydrological situation for August 2022

Figure 1. Exceedance of lowest discharge threshold level for August 2022.
Figure 1. Exceedance of lowest discharge threshold level for August 2022.
Figure 2. Exceedance of lowest water level threshold level for August 2022.
Figure 2. Exceedance of lowest water level threshold level for August 2022.
Figure 3. Classification of stations according to discharge historical data average percentile ranges for August 2022.
Figure 3. Classification of stations according to discharge historical data average percentile ranges for August 2022.

by EFAS Hydrological Data Collection Centre

During the month of August, there were 34 stations with exceedances. Most of them are in Spain (17), Italy (7), and Norway (4). In Spain, where almost all exceedances are related to the discharge threshold, the stations are mainly located in the northeast of the Iberian Peninsula. The Minho river basin is the only one in Spain with exceedance related to water level. In Italy, all exceedances are centered on the Po river and are related to the water level threshold. On the other hand, in Norway, all exceedances are related to the discharge threshold, and stations are dispersed in 4 different basins in the west of the country.

In addition, there are two stations with exceedance in Poland and Germany, and the rest of the countries with exceedance this month only show one each (Switzerland and Czech Republic).

In terms of river basins, the main one with values above the threshold is the Llobregat, with seven exceedances. The Po River in Italy is another basin that can be highlighted, with six exceedances.

Regarding the stations that recorded values above the 90% quantile, 51 exceeded this threshold in August. Once again this month, Spain is the country with the highest number of stations. The Spanish basins have 22 stations, with the Júcar river being the most numerous (6). In the south of the Iberian Peninsula the Guadalhorce, the Guadalquivir and the Guadiaro are the basins with stations recording values above the 90% quantile, and in the eastern area the Júcar stands out. In Norway, there are 12 stations exceeding this quantile, with four in Italy and five in Ukraine.

Other stations exceeded the 90% quantile value in England, Iceland, Austria, Germany, Romania, and Serbia.

By basins, in addition to the aforementioned Jucar (with 6 stations), the Dnieper river also stands out with five stations and the Guadalhorce river with three stations.

Finally, and according to the number of stations recording mean values below the 10% quantile, we find a decrease of around 10%. In the month of August, there are 352 stations with average values below this cliff, which covers river basin areas in 24 different countries.

Also this month, Germany is the country with the most stations (64), followed by France (59) stations, and Spain and Austria have 24 stations each below the threshold.

In terms of basins, it is again the Danube river the one with the highest number of stations, reaching 113 stations with an average discharge below the 10% quantile. The Rhine basin has 79 stations in the same situation. In total, as many as 52 different basins have values below this limit.