by EFAS Hydrological Data Collection Centre
For September, the highest concentration of stations that exceeded their lowest threshold level (almost 50 percent of the total number of stations that exceeded this month) was located in Italy, in the Po river basin. In central Europe, the Danube river basin is notable, containing stations with their threshold level exceeded in Austria, Slovenia, Germany, Hungary, and the Czech Republic. Another concentration of stations can be seen across Norway and finally, some scattered stations are found between the Oder and Vistula river basins on the west side of Poland.
With respect to stations registering values above the 90% quantile, these are located in central Europe, mainly in the Danube (Austria, Romania, Serbia, Germany, Slovakia, Ukraine, Czech Republic, Slovenia, Bulgaria, Bosnia and Herzegovina, and Croatia) and Rhine river basins. To a minor extent, values above 90% quantile can be found in stations located in basins to the north of the Danube (Dnieper, Vistula, Oder, Elbe) and west Rhine river basins (Meuse, Rhône, Seine, Loire, Vilaine, Hérault). Also, a high density of stations exceeding the 90% quantile is located in Spanish (Ebro, Douro, Guadalquivir, Minho and Ter) and Norwegian river basins, mainly in the south-central area. Values above the 90% quantile were also registered in isolated stations in basins located in Great Britain and Ireland (Don, Exe, Mersey, Thames, Yare, Barrow and Shannon basins), northern Finland basins (Naatamo, Kemijoki and Tana) and Sweden (Moälven basin).
Finally, and regarding values under quantile 10%, the greatest concentration of stations that met this condition are located in southern Sweden, in the Hungarian Danube basin, and in north-eastern France (Rhone and Seine basins). We can also find stations showing values below 10% in Germany (Rhine and Elbe basins), Poland (Vistula and Oder basins), central Norway, southern England (Thames basin) and in southern Spain. Besides those listed above, other isolated stations also showing values below the 10% quantile are located in Serbia (Danube basin), Ukraine (Dnieper river basin), and in Spain (Minho river).