The Chiani ( la, Clanis or ''Glanis'', grc, Κλάνις or Γλάνις) is a river in the

Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, an ethnic group or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance language *** Regional Ita ...

region of

Tuscany Tuscany ( ; it, Toscana ) is a Regions of Italy, region in central Italy with an area of about and a population of about 3.8 million inhabitants. The regional capital is Florence (''Firenze''). Tuscany is known for its landscapes, history, art ...

. It is 42 km long. It begins in the

Apennines The Apennines or Apennine Mountains (; grc-gre, links=no, Ἀπέννινα ὄρη or Ἀπέννινον ὄρος; la, Appenninus or – a singular with plural meaning;''Apenninus'' (Greek or ) has the form of an adjective, which wou ...

Arezzo Arezzo ( , , ) , also ; ett, 𐌀𐌓𐌉𐌕𐌉𐌌, Aritim. is a city and ''comune'' in Italy and the capital of the province of the same name located in Tuscany. Arezzo is about southeast of Florence at an elevation of above sea level. ...

, runs through the valley of Chiusi, and discharges into Paglia near

Orvieto Orvieto () is a city and ''comune'' in the Province of Terni, southwestern Umbria, Italy, situated on the flat summit of a large butte of volcanic tuff. The city rises dramatically above the almost-vertical faces of tuff cliffs that are compl ...

. Historically, they often caused substantial flooding in the valley of Clusium (Chiusi), which was felt even up to Rome. In the year 15 AD, it was suggested that it be part of the water in the Chiana Arnus (Arno). This project was abandoned because of opposition by the Florentines.

Appian Appian of Alexandria (; grc-gre, Ἀππιανὸς Ἀλεξανδρεύς ''Appianòs Alexandreús''; la, Appianus Alexandrinus; ) was a Greek historian with Roman citizenship who flourished during the reigns of Emperors of Rome Trajan, Hadr ...

mentions that in 82 BC, a battle was fought between

Sulla Lucius Cornelius Sulla Felix (; 138–78 BC), commonly known as Sulla, was a Roman general and statesman. He won the first large-scale civil war in Roman history and became the first man of the Republic to seize power through force. Sulla had ...

and

Gnaeus Papirius Carbo Gnaeus Papirius Carbo (c. 129 – 82 BC) was thrice consul of the Roman Republic in 85, 84, and 82 BC. He was the head of the Marianists after the death of Cinna in 84 and led the resistance to Sulla during the civil war. He was proscribed by Su ...

, on the banks of the river, near

Clusium Clusium ( grc-gre, Κλύσιον, ''Klýsion'', or , ''Kloúsion''; Umbrian:''Camars'') was an ancient city in Italy, one of several found at the site. The current municipality of Chiusi (Tuscany) partly overlaps this Roman walled city. The Roman ...

, in which the former was victorious.

, ''B.C.'', 1.89 In the Middle Ages, the entire valley between

and Chiusi was an uninhabitable swamp, but towards the end of the 18th century, the engineer Conte Fossombroni addressed the issue, and moved the watershed by about 25 km further south, so that water from this valley now flows partly into the

Arno The Arno is a river in the Tuscany region of Italy. It is the most important river of central Italy after the Tiber. Source and route The river originates on Monte Falterona in the Casentino area of the Apennines, and initially takes a s ...

and partly into the Tiber.

References

{{Reflist Rivers of the Province of Perugia Rivers of the Province of Terni Rivers of Italy