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Tirso
River
Fordongianus - Ponte sul Tirso-SS 388 (06).JPG
Fordongianus - bridge over the Tirso river
Country Italy
Region Sardinia
Provinces Nuoro, Sassari, Oristano
Tributaries
 - left Taloro, Mannu
City Oristano
Source Buddusò plateau
 - location Bitti, Nuoro, Italy
 - elevation 985 m (3,232 ft)
Mouth Mediterranean Sea
 - location Golf of Oristano, Oristano, Italy
 - elevation m (0 ft)
 - coordinates 39°53′6″N 8°32′26″E / 39.88500°N 8.54056°E / 39.88500; 8.54056
Length 159 km (99 mi)
Basin 3,376 km² (1,303 sq mi)
Discharge
 - average 16.6 /s (586 cu ft/s)

The Tirso (Sardinian: Tirsu) is the most important river of Sardinia for its length ad the size of its drainage basin. It starts on the mountains of the centre of the island and ends in the Mediterranean Sea.

Name

The river was known in Sardinia as riu de Aristanis ("river of Oristano") or, simply, riu Mannu (the "big river"). The name Tirso began to be used in modern times following Ptolemy that named it in ancient times as "Thyrsos" ([Tyrsou potamoũ ekbolái] Error: {{Lang-xx}}: text has italic markup (help), "mouth of the Tirso river").

Geography

LagoGusana
Gusana lake, formed by the Taloro river before joining the Tirso

The Tirso river has a length of 159 km (99 mi), and a drainage basin with an area of approximately 3,376 km2 (1,303 sq mi).

Its discharge (volume of water which passes through a section of the river per unit of time) depends of the season; its average discharge is 16.6 m3/s (590 cu ft/s) but is very low during summer.

Course

The Tirso river starts in the Buddusò plateau, on the slopes of Punta Pianedda, at an elevation of about 985 m (3,232 ft), to the north of the comune of Bitti. From here, the river flows to the southwest.

Finally, after 150 km (93 mi), it flows into the Gulf of Oristano in the Sea of Sardinia (Mediterranean Sea). The river enters the sea at about 6 km (3.7 mi) to the north of the city of Oristano.

The river forms the "Omodeo lake", an artificial lake that is 20 km (12 mi) long and 3 km (1.9 mi) wide; it is one of largest artificial lake in Italy.

It flows through 81 comuni.

Main tributaries

Most tributaries of the Tirso are small streams; the main tributaries are:

  • Taloro, the main tributary, 67.61 km (42.01 mi) long and a drainage basin of 495.02 km2 (191 sq mi); and
  • Massari, the second largest tributary, 37.78 km (23.48 mi) long and a drainage basin of 833.73 km2 (322 sq mi).

Both rivers are left tributaries of the Tirso.

Related pages

See also

Kids robot.svg In Spanish: Río Tirso para niños

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