The Lemme is a 35 km

torrent Torrent or torrents may refer to: * A fast flowing stream Animals * Torrent duck, a species of the family Anatidae * Torrent fish * Torrent frog, various unrelated frogs * Torrent robin, a bird species * Torrent salamander, a family of sala ...

, a right tributary of the Orba, which flows through the

Province of Alessandria The Province of Alessandria ( it, Provincia di Alessandria; pms, Provincia ëd Lissandria; in Piedmontese of Alessandria: ''Provinsa ëd Lissändria'') is an Italian province, with a population of some 425,000, which forms the southeastern part o ...

in northern

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

Geography

Its source is near

Monte Calvo Monte may refer to: Places Argentina * Argentine Monte, an ecoregion * Monte Desert * Monte Partido, a ''partido'' in Buenos Aires Province Italy * Monte Bregagno * Monte Cassino * Montecorvino (disambiguation) * Montefalcione Portugal * Monte ...

; from there it passes through the

communes An intentional community is a voluntary residential community which is designed to have a high degree of social cohesion and teamwork from the start. The members of an intentional community typically hold a common social, political, religious, ...

Fraconalto Fraconalto (until 1927, Fiaccone) is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria and from Genoa-Pontedecimo Pontedecimo is a di ...

Voltaggio Voltaggio (Ottaggio in Ligurian) is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria. Located there is a Roman bridge on the Lemme st ...

Carrosio Carrosio is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria. As of 31 December 2004, it had a population of 468 and an area of .All dem ...

Gavi GAVI, officially Gavi, the Vaccine Alliance (previously the GAVI Alliance, and before that the Global Alliance for Vaccines and Immunization) is a public–private global health partnership with the goal of increasing access to immunization ...

San Cristoforo San Cristoforo (in local dialect San Cristòfi) is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria. As of 31 December 2004, it had a p ...

Francavilla Bisio Francavilla Bisio is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria. Francavilla Bisio borders the following municipalities: Basaluzz ...

Basaluzzo Basaluzzo is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria. Basaluzzo borders the following municipalities: Bosco Marengo, Capriata ...

and finally

Predosa Predosa is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about south of Alessandria. Predosa borders the following municipalities: Basaluzzo, Bosco Marengo, Capria ...

where it enters the Orba.

Main tributaries

left hand tributaries

* rio delle Acque Striate; * rio Morsone: it starts near

Monte Tobbio Monte Tobbio (in Ligurian ''Monte Tuggiu'') is a 1092 metres high mountain of the Apennines, located in the Italian region of Piedmont. Geography The mountain stands on the Adriatic side of the drainage divide defined by the Ligurian A ...

and meets the Lemme in

; * rio Ardana: its upper valley includes

Bosio Bosio is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria. Bosio borders the following municipalities: Campo Ligure, Campomorone, Ca ...

, from which flows northwards meeting the Lemme in

; * rio Riolo: from

it runs not faraway from the Lemme meeting it near its confluence with the Orba.''Carta Tecnica Regionale'' raster 1:10.000 (vers.3.0); publisher:Regione Piemonte - 2007

right hand tributaries

* rio Carbonasca: from

goes till

where it meets the Lemme; * torrente Neirone: * torrente Riasco: it collects the waters flowing in the area of

Pasturana Pasturana is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria. As of 31 December 2004, it had a population of 1,086 and an area of .All ...

and

Tassarolo Tassarolo is a ''comune'' (municipality) in the Province of Alessandria in the Italian region Piedmont, located about southeast of Turin and about southeast of Alessandria. As of 31 December 2004, it had a population of 598 and an area of .All de ...

and meets the Lemme near

Floods

The Lemme is characterised by an extremely variable discharge; very little water flows during the summer months, but it can also give rise to significant floods, such as those of 1978.

History

The ''Département du Lemo'' or ''Dipartimento del Lemo'' of

Ligurian Republic The Ligurian Republic ( it, Repubblica Ligure, lij, Repubbrica Ligure) was a French client republic formed by Napoleon on 14 June 1797. It consisted of the old Republic of Genoa, which covered most of the Ligurian region of Northwest Italy, and ...

took its name at the end of the 18th century from the stream.

References

Rivers of the Province of Alessandria Rivers of Italy {{Italy-river-stub