Aulnois (river)
| Aulnois | |
| Aunois | |
| River | |
| Countries | Belgium, France |
|---|---|
| Tributaries | |
| - left | Matton |
| - right | La Goutelle |
| Mouth | Chiers |
| - location | Carignan, Ardennes, France |
| - coordinates | 49°38′04″N 5°08′39″E / 49.6345°N 5.1443°ECoordinates: 49°38′04″N 5°08′39″E / 49.6345°N 5.1443°E |
| Length | 18 km (11 mi) |
| Area | 101.8 km2 (39 sq mi) |
| Discharge | |
| - average | 2.10 m3/s (74 cu ft/s) |
The Aulnois (also: Aunois) is a Franco-Belgian river which flows in the French Ardennes département and in Luxembourg Province in the far south of Belgian Wallonia. It is a fairly fast-flowing right tributary of the Chiers.
The Aulnois rises in the forest of Muno which stretches over the south of the Belgian province of Luxembourg. It generally flows southwards throughout its course. After crossing the Franco-Belgian border it continues towards the south until its confluence with the Chiers, which occurs at Carignan in the Ardennes just after the Aulnois has received its main tributary, the Matton.
The Aulnois flows through the French communes of Messincourt, Pure, Osnes and Carignan, all in the Ardennes département. In Belgium it flows through Muno, part of the Florenville municipality in Luxembourg province.
The Aulnois is a small but substantial river. At its confluence with the Chiers, its mean annual flow rate or discharge rises to 2.10 cubic metres per second (74 cu ft/s) for a watershed of 101.8 square kilometres (39.3 sq mi). The runoff curve number in the watershed is 651 millimetres (25.6 in), which is very high, approximately twice the average for France including all watersheds. It is also higher even than the French Meuse basin, which is itself relatively high, at 450 millimetres (18 in) at Chooz near the border. Its specific flow rate thus reaches the high value of 20.6 litres per second per square kilometre of watershed.
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Wikipedia