| km² | Bassin fluvial | % Correct |
|---|---|---|
| 185 k | Rhin | 100%
|
| 98.1 k | Rhône | 100%
|
| 117 k | Loire | 97%
|
| 802 k | Danube | 93%
|
| 55.8 k | Garonne | 93%
|
| 75.4 k | Seine | 93%
|
| 73.7 k | Pô | 86%
|
| 1433 k | Volga | 86%
|
| 510 k | Dniepr | 83%
|
| 148 k | Elbe | 76%
|
| 437 k | Don | 72%
|
| 193 k | Vistule | 66%
|
| 73.2 k | Dniestr | 59%
|
| 97.3 k | Douro | 59%
|
| 84.8 k | Ébre | 59%
|
| 211 k | Oural | 59%
|
| 70.8 k | Tage | 55%
|
| 119 k | Oder | 52%
|
| 281 k | Neva | 45%
|
| 57.1 k | Guadalquivir | 41%
|
| 357 k | Dvina septentrionale | 24%
|
| 92.5 k | Niémen | 24%
|
| 85.6 k | Daugava | 21%
|
| 78.0 k | Mezen | 21%
|
| 322 k | Petchora | 21%
|
| 46.3 k | Weser | 21%
|
| 67.0 k | Guadiana | 14%
|
| 63.6 k | Boug méridional | 10%
|
| 52.4 k | Kouban | 7%
|
| 53.5 k | Maritsa | 7%
|
| 56.2 k | Narva | 7%
|
| 50.2 k | Göta älv | 3%
|
| 56.9 k | Onega | 3%
|
| 51.1 k | Kemijoki | 0%
|