1
This area includes the depression of the river Ebro, on the east of the peninsula and all the Mediterranean coast of Andalucia
2
This area ranges the area from the cantabrian sea to the Cordillera Cantabrica and to the Montes Vascos
3
This area occupies a major part of Galicia all the Meseta Central and the depression of the river Guadalquivir
4
The territory a river runs through and the triibutaries that flow into it form a
