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


Hydrological situation for March 2022

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

by EFAS Hydrological Data Collection Centre

During the month of March, there were 68 stations with exceedances, the majority of which were in Spain (34 stations across 15 basins). Regarding water level, the exceedances are focused on the southern area (Guadalhorce and Guadiaro basins) and the Ebro basin. In terms of discharges values, the stations are centered in the north-east: in Llobregat, Ter and Ebro basins, and the east of Spain: Jucar, Muga and Serpis basins.

Additionally, there was a high concentration of stations with exceedances in Poland (in the Oder and Vistula basins) and in Iceland, mainly in the Oelfusa basin. There are also some countries with more than two stations with exceedances such as Italy, Switzerland, Ukraine, and Bosnia & Herzegovina.

Regarding the stations that recorded values above the 90% quantile, 81 exceeded this threshold in March (of which 31 are located in the south and east regions of Spain) The basin with the highest number of stations in Spain is the Jucar Basin (11). Norway has 28 stations, followed by Finland (7) and Sweden (6) on the Scandinavian peninsula, as in the previous month.

Evaluating by basin, in addition to the Jucar, there are the Glomma and Torne rivers with five stations each and the Tana basin with three.

Many other stations exceeded the 90% quantile value in France, Italy, Germany, England, and Iceland. 

Finally, and according to the number of stations recording average values below the 10% quantile, we find an increase of close to 50%, amounting to 150 stations. Spain remains in the lead with 22 stations (one third of which occurred in February), with 12 of them in the Minho basin. The rest are distributed on the south, northwest and northeast. Croatia has a similar number of stations (21), with a large increase this month, mainly in the Danube basin. This river is the one with the highest number of stations, with 76 distributed across ten countries.

Lastly, the Rhine basin presents 15 stations with values below 10% quantile, mainly in Germany and Switzerland. The Po river (Italy) or the Thames river (England) are also remarkable.