Tagus and Sado River Estuaries, Portugal – June 16th, 200938.7N 9.1W
Two important estuaries are visible along the coast of Portugal: that of the Tagus River (left) and that of the Sado River (right). Both contain brownish sediments which take on a progressively greener color as they spill into the Atlantic Ocean.
The Tagus is the longest river on the Iberian Peninsula. It measures 1,038 kilometers in length, 275 km of which are in Portugal.
The mouth of the Tagus is a large estuary, and it empties into the Atlantic at the port city of Lisbon.
The other estuary is visible southeast of the Tagus, at the city of Setúbal. This is where the Sado River enters the Atlantic Ocean after flowing 175 km from its springs in the Caldeirão hills.
The Sado is dammed in several places chiefly for agricultural reasons, such as growing rice, corn and other vegetables. In Setúbal, its estuary is famous for being the habitat for a large community of bottlenose dolphins.