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Tiber(tī`bər), Ital. Tevere, Latin Tiberis, river, 251 mi (404 km) long, rising in the Etruscan Apennines, central Italy. It flows generally S across Tuscany, Umbria, and N Latium, then SW through Rome to empty into the Tyrrhenian Sea by two mouths. It is connected with the Arno River by the Chiana Canal, an important route between Rome and Florence. The upper Tiber and its chief tributaries, the Nera and Aniene rivers, are used to generate electricity. Subject to floods, the banks of the Tiber, especially in Rome, are diked. The silt-laden Tiber continues to extend its delta westward. Ostia Antica, the site of Ostia, the coastal port of ancient Rome, now lies 4 mi (6 km) from the sea. Most of the marshland in the delta has been reclaimed for agriculture.
(in Italian, Tevere), a river in Italy. The Tiber, the major watercourse of the Italian Peninsula, measures 405 km in length and drains an area of 16,500 sq km. It originates in the southern Tuscan Apennines, and in its upper and middle courses is a mountain river with alternating ravines and basins. There are rapids and waterfalls on the tributaries of the Tiber at Le Mar-more, Tivoli, and elsewhere. In its lower course, the river flows through the Maremma. A delta 250 sq km in area is formed at the river’s mouth on the Tyrrhenian Sea.
The Tiber, fed primarily by rain, has freshets from November to March or April and occasional floods. The river carries a large amount of suspended matter. The mean flow rate is 260 cu m per sec. The Corbara-Baschi and Galleto hydroelectric power plants are situated in the river basin. The Tiber is used for irrigation. Rome is located on the river.