| Cours d'eau | Longueur | % Correct |
|---|---|---|
| Guadalquivir | 657km | 81%
|
| Douro | 897km | 70%
|
| Ebre | 928km | 70%
|
| Tage | 1007km | 54%
|
| Guadiana | 744km | 48%
|
| Miño | 318km | 39%
|
| Segura | 325km | 35%
|
| Júcar | 498km | 33%
|
| Esla | 288km | 9%
|
| Genil | 358km | 6%
|
| Jarama | 190km | 6%
|
| Pisuerga | 280km | 6%
|
| Jalón | 224km | 4%
|