The Théols is a

river A river is a natural flowing watercourse, usually freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the ...

in central France. Its source is at near

Bommiers Bommiers () is a commune in the Indre département in central France. Population See also *Communes of the Indre department The following is a list of the 241 communes of the Indre department of France. The communes cooperate in the follow ...

, in the Boischaut natural region. It joins the Arnon near

Lazenay Lazenay () is a commune in the Cher department in the Centre-Val de Loire Centre-Val de Loire (, , ,In isolation, ''Centre'' is pronounced . ) or Centre Region (french: région Centre, link=no, ), as it was known until 2015, is one of the eig ...

Hydrology

The flow of the river was studied from 1971 to 1975 at

Sainte-Lizaigne Sainte-Lizaigne is a commune in the Indre department Department may refer to: * Departmentalization, division of a larger organization into parts with specific responsibility Government and military *Department (administrative division), a ge ...

, located about from its confluence with the Arnon. At this point it drains , over 90% of its

watershed Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to: Hydrology * Drainage divide, the line that separates neighbouring drainage basins * Drainage basin, called a "watershe ...

. The river has an average flow of at Sainte-Lizaigne. There are seasonal fluctuations in the flow of the Théols, but they are not substantial. The highest flow rates are from February to May, with average flows from (peak February–March). From April, the flow rate decreases regularly toward low water, which lasts from August to October. Floods are seldom important. The daily maximum flow recorded at Sainte-Lizaigne was on March 22, 1974. Its yearly

drainage basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...

precipitation In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls under gravitational pull from clouds. The main forms of precipitation include drizzle, rain, sleet, snow, ice pellets, graupel and hai ...

is currently , just over a third of the national average of , and also below the average of for the

Loire The Loire (, also ; ; oc, Léger, ; la, Liger) is the longest river in France and the 171st longest in the world. With a length of , it drains , more than a fifth of France's land, while its average discharge is only half that of the Rhôn ...

basin () and the Arnon (). The

discharge Discharge may refer to Expel or let go * Discharge, the act of firing a gun * Discharge, or termination of employment, the end of an employee's duration with an employer * Military discharge, the release of a member of the armed forces from serv ...

was hence per km² of basin.

Fish

The river is rich in bleak, barbel,

largemouth bass The largemouth bass (''Micropterus salmoides'') is a carnivorous freshwater gamefish in the Centrarchidae ( sunfish) family, a species of black bass native to the eastern and central United States, southeastern Canada and northern Mexico, b ...

cream Cream is a dairy product composed of the higher-fat layer skimmed from the top of milk before homogenization. In un-homogenized milk, the fat, which is less dense, eventually rises to the top. In the industrial production of cream, this process ...

, pike, crucian, roach,

gudgeon A gudgeon is a socket-like, cylindrical (i.e., '' female'') fitting attached to one component to enable a pivoting or hinging connection to a second component. The second component carries a pintle fitting, the male counterpart to the gudgeon, ...

, rudd,

perch Perch is a common name for fish of the genus ''Perca'', freshwater gamefish belonging to the family Percidae. The perch, of which three species occur in different geographical areas, lend their name to a large order of vertebrates: the Per ...

tench The tench or doctor fish (''Tinca tinca'') is a fresh- and brackish-water fish of the order Cypriniformes found throughout Eurasia from Western Europe including the British Isles east into Asia as far as the Ob and Yenisei Rivers. It is als ...

, zander and

catfish Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, ...

References

{{DEFAULTSORT:Theols Rivers of France Rivers of Centre-Val de Loire Rivers of Indre Rivers of Cher (department)