Ternoise
{{Infobox river
| name = Ternoise
| image = Image-Ternoise amont hesdin.JPG
| image_size = 280px
| image_caption =
| pushpin_map = France#France Hauts-de-France
| source1_location = Pas-de-Calais
| mouth_location = Canche
| mouth_coordinates = {{coord|50|22|53|N|2|0|41|E|format=dms|display=inline,title}}
| progression = {{RCanche}}
| subdivision_type1 = Country
| subdivision_name1 = France
| length = {{convert|41.4|km|mi|abbr=on}}
| source1_elevation =
| discharge1_avg = {{convert|4.45|m3/s|cuft/s|abbr=on}}
| basin_size = {{convert|342|km2|mi2|abbr=on}}
}}
The river Ternoise ({{IPA|fr|tɛʁnwaz}}; {{langx|nl|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 {{convert|342|km2|mi2}} 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.
Geography
The {{convert|41.4|km|mi|adj=on}} long river{{sandre|E5400650|Ternoise}} 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.
Gallery
Image:Ternoise-hernicourt.JPG|The Ternoise at Hernicourt
Image:auchy.jpg|The Ternoise at Auchy-lès-Hesdin
Image:TernoiseAnvinA.JPG|The Ternoise at Anvin
Image:TernoiseAnvinB.JPG|At Anvin, further upstream
See also
References
{{Reflist}}
External links
{{Commons category|Ternoise}}
- Carte Géologique de la France à l'échelle du millionième 6th edn. BRGM (2003) {{ISBN|2-7159-2158-6}}
- [http://www.hydro.eaufrance.fr/selection.php Banque Hydro - Station E5406510 - La Ternoise à Hesdin (option Synthèse) ]
- [http://perso.orange.fr/sagedelacanche/carte/presentationbv.pdf Carte des bassins versants de la Canche et de la Ternoise]
- [https://web.archive.org/web/20061126133058/http://www.nord-pas-de-calais.ecologie.gouv.fr/v4/Donnees/azi/index.asp Informations sur les atlas des zones inondables]
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