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


Hydrological situation for July 2020

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

For the month of July, the highest concentration of stations that exceeded their lowest threshold level is located in Poland through the Oder and Vistula basins, northern Italy (Po basin), Switzerland (Rhine basin), and the central Danube basin (Serbia, Croatia, Romania and Bosnia). There was a more dispersed distribution of stations with exceedances in the eastern and northern Danube basin (Germany, Austria, Czech Republic, Hungary, and Ukraine) and the Scandinavian peninsula (Norway and Sweden). In addition to the previous ones, we also find isolated stations exceeding the lowest threshold level in the rivers Uma in northwest Spain, Rioni in Georgia, and Dniester in southern Ukraine.

Regarding to stations registering values above the 90% quantile, these are mostly located in the northern and central Danube river basin (Hungary, Czech Republic, Romania and Austria) as well as in Norway, mainly in the south. To a minor extent, other stations also exceeding the 90% quantile occurred in several Spanish river basins, such as Guadalquivir, Ebro, Guadalhorce, Llobregat and Ter, the Dnieper river basin in Ukraine, the Thames, Welland and Mersey river basins in England, the Vistula basin in Poland, and in southern Sweden. Values above the 90% quantile were also registered in isolated stations in Moy river (Ireland), Clyde river (Scotland) and Rednitz river in the German Rhine basin.

German stations located in the Rhine, Danube and Elbe basins, the Oder river basin in Poland, as well as Douro, Ebro and Minho basins in Spain mainly registered values lower than the 10% quantile. We can also find stations showing values below 10% in the Thames (England) and southern Scandinavia (Glomma, Vormo, Vindan, and Alsteran basins). Besides those listed above, other isolated stations also showing values below the 10% quantile are located in the Horyn (Ukraine), Sambre (Belgium), Rhine (Switzerland), Cherni Lom (Bulgaria), Barland (Romania), and Ohre (Czech Republic).