Authie (river)

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Authie
The Authie at Frohen-sur-Authie
Native name	Eutie (French)
Location
Country	France
Physical characteristics
Source
• location	Picardie
• elevation	131 m (430 ft)
Mouth
• location	English Channel
• coordinates	50°23′30″N 1°33′40″E / 50.39167°N 1.56111°E / 50.39167; 1.56111
Length	108 km (67 mi)
Basin size	1,304 km2 (503 sq mi)
Discharge
• average	10.8 m3/s (380 cu ft/s)

The Authie (French pronunciation: [o.ti] ^ⓘ; Picard: Eutie; (West Flemish: Otie)) is a river in northern France whose 108-kilometre (67 mi) course crosses the departement of the Pas-de-Calais and the Somme.^[1] Its source is near the village of Coigneux. It flows through the towns of Doullens, Auxi-le-Château, Nempont-Saint-Firmin and Nampont, finally flowing out into the Channel near Berck. ^[1]

Its steady flow has attracted mankind for many centuries, developing an agricultural environment that is still dominant today. The valley of the Authie, with many towns, villages, abbeys and chateaux, holds a rich architectural heritage alongside the banks of the river, while the river mouth forms a sizeable bay between Fort-Mahon-Plage and Berck, typical of Picardy estuaries. The area is home to a diverse range of flora and fauna.