Grouche

Grouche
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Data
Water code	FR :  E5500650
location	France , Hauts-de-France region
River system	Authie
Drain over	Authie  → English Channel
source	in the parish of Coullemont, 50 ° 13 ′ 17 ″  N , 2 ° 29 ′ 9 ″  E
Source height	approx.  155  m
muzzle	in the urban area of Doullens in the Authie coordinates: 50 ° 9 ′ 16 ″  N , 2 ° 20 ′ 7 ″  E 50 ° 9 ′ 16 ″  N , 2 ° 20 ′ 7 ″  E
Mouth height	approx.  56  m
Height difference	approx. 99 m
Bottom slope	about 6 ‰
length	16.5 km
Small towns	Doullens

The Grouche is a small river in France that runs in the Hauts-de-France region . It rises in the municipality of Coullemont , drains generally in a south-westerly direction and flows into the Authie after 16.5 kilometers in the urban area of Doullens , opposite the Doullens citadel , as a right tributary . The Grouche has formed a small, asymmetrical valley with short side valleys on the orographic left side. On its way it crosses the Pas-de-Calais and Somme departments . For a long time it formed the border between Picardy and the historical province of Artois .

Places on the river

(Order in flow direction)

• Coullemont
• Humbercourt
• Lucheux
• Grouches-Luchuel
• Doullens

Individual evidence

1. ↑ Source geoportail.gouv.fr
2. ↑ estuary geoportail.gouv.fr
3. ↑ ^{a b} The information on the length of the river is based on the information about the Grouche at SANDRE (French), accessed on November 5, 2013.