Matching Pairs WatershedsOnline version Match the watersheds of Spain with their characteristics. by Jesús Mínguez Corrales 1 Mediterranean watershed 2 Cantabrian watershed 3 Atlantic watershed It has (except Ebro) short rivers, and their flow is irregular. They are sometimes dry in the summer. It has rivers with abundant and fairly regular flow, but they carry less water in the summer. It has short, rapid rivers. Their flow is abundant and regular.