Ría de Arousa
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The Ría de Arousa is a ria, a saline estuary, that forms a firth situated on Galicia, Spain. It is one of the five Rías Baixas. The Ría de Arousa estuary is the largest of the estuaries of Galicia. It is part of the Rias Baixas and is located between the estuary of Muros and Noia to the north and the Pontevedra estuary to the south. The peninsulas of Barbanza, in the province of A Coruña, and O Salnés, in the province of Pontevedra, are those who define their coasts on the north and south, respectively.
It is the largest estuary, although not reaching the higher levels bathymetric, at 69 m maximum depth at the mouth. It has numerous islands and islets among which the island of Arousa, A Toxa, Sálvora in the mouth and Cortegada at the entrance. The main rivers that flow to it are the Ulla river at its headwaters and the river Umia in the cove that forms the peninsula of O Grove with the coast of Cambados.
The most important river towns are Ribeira, Pobra do Caramiñal, Rianxo and Boiro to the north, and Vilagarcía de Arousa, Vilanova de Arousa, Cambados and O Grove to the south, and Arousa in the homonymous island.
The northern zone, corresponding to the province of A Coruña, is relatively steep, with the Serra da Barbanza near the coast. The beaches take a few metres depth from the shore, forming sand banks in the interior bays.
The southern zone, corresponding to the province of Pontevedra, is a flood zone, where the river Umia ends. The characteristic of the coast is shallow, with extensive formation of sand banks, where many arenicolous bivalves are grown like cockles or clams. The most well-known banks of Sarrido belong to the delta of Umia river and Os Lombos do Ulla belonging to the homonymous river delta. This southern area is relatively flat up to the highlands of Mount Castrove, which separates it from the Ría de Pontevedra, and is characterized by small farm plots usually cultivated with vegetables (Padrón peppers, tomato, lettuce and legumes) or grapevines. The graphevines in the O Salnés area is mostly white grape Salnés (varieties Albariño wine). There are also cultivated dark grapes for the production of red wine also known Barrantes. There are also pink grape cultivated with which Catalan wine is made.
Its physical configuration allows a high production of phytoplankton, with a characteristic ocean flow that makes this river famous for its rich marine life. It is the area of greatest mussel production in all the world. They are grown in nurseries, cultivated in floating rafts.
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