to the Atlantic. The Guadalquivir River, flowing through a fertile plain in the south, is the deepest river in Spain and the only one navigable for any extent. The Ebro River, in northeastern Spain, flows into the Mediterranean Sea, and is navigable by small craft for part of its course. Most Spanish streams are too small for interior navigation, and, with courses below the general ground level, are of little use for irrigation. The rivers are, however, a good source of electric power....
