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


Hydrological situation for December 2019

Figure 1. Exceedance of lowest threshold levels for discharge
Figure 1. Exceedance of lowest threshold levels for discharge
Figure 2. Exceedance of lowest threshold levels for water level.
Figure 2. Exceedance of lowest threshold levels for water level.
Figure 3. Monthly classification for discharge according to historical data average percentiles.
Figure 3. Monthly classification for discharge according to historical data average percentiles.

For the month of December, the highest concentration of stations that exceeded their lowest threshold level was in the Po river basin in Italy, the Mihno-Sil and the Limia river basins, in northwestern Spain, and the Danube river basin in Croatia, Serbia, Slovenia, southern Austria, Slovakia and Ukraine. A more dispersed distribution of stations with exceedances ocurred in southern Sweden, western Norway and Neretva river basin, in Bosnia and Herzegovina. In addition, there were isolated stations exceeding the lowest threshold level in southern Rhine (Germany), Dnieper (Ukraine), Oder (Poland), Neman (Belarus) and Llobregat (northwestern Spain) river basins.


Stations in the Danube river basin in Serbia, Germany, Austria, Romania and Czeck Republic, as well as those located in the Elbe river basin in Germany and Czech Republic, and the Oder river basin in Poland and Germany, mainly registered values lower than the 10% quantile. We also found stations showing values below 10% in the Vistula (Poland and Ukraine) and Dnieper (Ukraine) river basins. Besides those listed above, other isolated stations also showing values below the 10% quantile are located in the Rhine (Germany), Maritsa (Bulgaria), Thames (United Kingdom), Skien and Glomma (Norway) and Kemijoki (Finland) river basins.


Contrastingly, stations that recorded discharge values above the 90% quantile are mostly located in Spanish river basins (such as Guadalquivir, Douro, Ebro, Minho-Sil, Llobregat and Ter), in the Danube river basin (Austria, Slovakia, Slovenia and Hungary), as well as in Norwegian and Swedish river basins. To a minor extent, other stations also exceeding the 90% quantile occurred in basins in northern Finland and northern Italy (in this latter case, particularly in the Po river basin). Values above 90% quantile were also registered in isolated stations distributed across United Kingdom (Thames and Nene rivers), France (Garonne river), Belarus (Daugava river), Ukraine (Dnieper river) and Poland (river Oder).