Basin size 797 km (308 sq mi) | Length 42.3 km (26.3 mi) | |
 | ||
Main source Les Sapins, Bommiers
150 m (490 ft) River mouth Arnon, Lazenay
112 m (367 ft) Progression Arnon→ Cher→ Loire→ Atlantic Ocean Tributaries Left:
Tournemine
Right:
Cousseron, Thonaise | ||
The Théols is a French river, that flows in the Boischaut natural region.
Contents
GeographyEdit
The river is 42.3 km long and crops at 150 m near Bommiers in the Boischaut natural region; it joins the Arnon near Lazenay.
HydrologyEdit
The river debit was studied from (1971 to 1975) at Sainte-Lizaigne (located about 10 km from its confluent with the Arnon). The surface observed was 797 km², over 90% of its watershed.
The river has an average debit of 2.99 m3/s at Sainte-Lizaigne.
The Théols is a plain river that varies little. It presents seasonal debital fluctuations. High waters are around from February to May, with medium debits from 3,5 to 5 m/s (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 maximal debit recorded at Sainte-Lizaigne was 32.3m3/s on March 22, 1974. Its yearly drainage basin precipitation is currently of 118 mm, just over a third of the national average (320 mm), which is also below the average of the Loire basin (+/- 245 mm) and the Arnon (200 mm). The discharge was hence of 3,75 L/s and by km² of basin.
FishEdit
The river is lush in : bleak, Barbel, largemouth bass, cream, pike, crucian, roach, gudgeon, rudd, perch, tench, zander and catfish.