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


Hydrological situation for April 2020

Figure 1. Exceedance of lowest discharge threshold level for April 2020.
Figure 1. Exceedance of lowest discharge threshold level for April 2020.
Figure 2. Exceedance of lowest water level threshold level for April 2020.
Figure 2. Exceedance of lowest water level threshold level for April 2020.
Figure 3. Classification of stations according to discharge historical data average percentile ranges for April 2020.
Figure 3. Classification of stations according to discharge historical data average percentile ranges for April 2020.

The month of April has been characterised by a low number of stations exceeding their lowest threshold level. The Po river basin in Italy and Guadalhorce river basin in southern Spain, had the highest number of stations in this situation. The rest of the stations are found in isolation in the Danube river basin in Kosovo and Hungary, Vistula and Dnieper river basins in Ukraine, Loelva and Ataelva river basins in Norway, and Helge river basin in southern Sweden.

Stations that recorded discharge values lower than the 10% quantile, are found with a high incidence in most of the basins in central and eastern Europe: Rhine, Danube, Oder, Vistula, Dnieper and Dniester. We can also find stations showing values below 10% in stations of British Isles, and southern Sweden and Norway. In a minor extent we found the same situation in isolated stations in Ebro (Spain), Seine and Rhône (France) and Southern Bug (Ukraine) river basins.

Contrastingly, stations that recorded discharge values above the 90% quantile are mostly located in basins of northern Norway and Finland, Ebro river basin in Spain, and Danube river basin in Austria .This also occurs in isolated stations of Guadalquivir, Guadalhorce and Llobregat river basins in Spain, Nea and Farstad river basins in Norway, and Thames and Helge river basins in England and southern Sweden respectively.