Tiber River

The Tiber (, ) is the third-longest river in Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing mainly through Umbria and Lazio to the Tyrrhenian Sea, between Ostia and Fiumicino.

The river is well-known because the city of Rome was founded on its eastern banks.

Geography
The Tiber river has a length of , and a drainage basin with an area of approximately , almost 5% of the territory of the country.

It is the third longest river of Italy, after the Po and the Adige rivers, and the second by drainage basin after the Po.

 River  Length (km)  Watershed (km²) Po  652  74,970 Adige  410  12,200 Tiber  405  17,375

Course
The Tiber starts near the town of Balze, Verghereto comune in the southwestern end of the Forlì-Cesena province, in the southern side of Monte Fumaiolo. The source of the river is formed by two springs that are  from each other in a forest on the mountain at an elevation of  above sea level.

The Tiber flows through Emilia-Romagna about  and then it gets into Tuscany where flows through Pieve Santo Stefano and Sansepolcro. Between these two localities there is a dam with a large reservoir that is named as Montedoglio Lake (). From here, the river flows through a wide plain (Val Tiberina) and gets in the Perugia province (Umbria) and flows through the towns of Città di Castello and Umbertide.

To the south of Torgiano, it is joined by its left side by the Chiascio river and then, in the Marsciano dam, by the Nestore river by its right side. Soon another right tributary, the Paglia, joins the Tiber.

The river forms the border between the Umbria (province of Terni) and Lazio (province of Viterbo) regions. Near the city of Orte, it is joined by the left side by its main tributary, the Nera river.

It flows through the Lazio region (Viterbo, Rieti and Rome provinces) and is joined by the Aniene river, flows through the city of Rome and, finally, into the Tyrrhenian Sea between Ostia and Fiumicino.

Main tributaries 
The main tributaries are:

 Tributary  Length  Discharge Left tributaries Chiascio  82 km  19 m³/s Nera  116 km  168 m³/s Aniene  99 km  35 m³/s Right tributaries Nestore  64 km  11 m³/s Paglia  86 km   11 m³/s

Discharge
The average yearly discharge (volume of water which passes through a section of the river per unit of time) of the Tiber is  at its mouth.

The mean monthly discharges (in m³) for 2011 in Rome were:

 644  548  491  316  205  175  97  84  91  324  897  840 Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dic

Gallery

Related pages
 List of rivers of Italy

References

Other websites

 Fiume Tevere - Fiumi Italiani 

Category:Rivers of Italy