Ternoise

The river Ternoise (Dutch: Ternaas) is one of the small chalk streams that flow from the plateau of the southern Boulonnais and Picardy, via the Canche, into the English Channel. The basin of the Ternoise extends to 342 square kilometres (132 sq mi) and lies in the southern end of the département of Pas-de-Calais. It is one of the rivers of the Seven Valleys tourist area and gives its name to the Ternois area.

Ternoise
Location
CountryFrance
Physical characteristics
Source 
 • locationPas-de-Calais
Mouth 
 • location
Canche
 • coordinates
50°22′53″N 2°0′41″E
Length41.4 km (25.7 mi)
Basin size342 km2 (132 sq mi)
Discharge 
 • average4.45 m3/s (157 cu ft/s)
Basin features
ProgressionCanche→ English Channel

Geography

The 41.4-kilometre (25.7 mi) long river[1] rises at Ligny-Saint-Flochel and passes through Saint-Pol-sur-Ternoise to join the river Canche at Huby-Saint-Leu, near to the town of Hesdin.

Towns and villages along the course

The Ternoise flows through the following places (all within the Pas-de-Calais department):

Tributaries

The Faux and the Eps are the only principal watercourses joining the Ternoise.

Hydrological Information

The Ternoise is a very uniform river. Seasonal flow fluctuations are not very marked, similar to the Canche or the Somme, its neighbours. The higher water flows occur at the end of winter and in the spring. Average flows vary between 3.44 m³ per second in September to 5.36 m³ per second in March.

See also

References
  1. The Ternoise at the Sandre database
  • Carte Géologique de la France à l'échelle du millionième 6th edn. BRGM (2003) ISBN 2-7159-2158-6
  • http://www.geoportail.fr
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