Somme (river)

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Somme
The Somme
Course in Northern France
Location
Country	France
Region	Picardy
Physical characteristics
Source
• location	Fonsommes
• coordinates	49°54′23″N 03°24′11″E / 49.90639°N 3.40306°E / 49.90639; 3.40306
• elevation	85 m (279 ft)
Mouth
• location	Saint-Valery-sur-Somme English Channel
• coordinates	50°11′10″N 01°38′35″E / 50.18611°N 1.64306°E / 50.18611; 1.64306
Length	245 km (152 mi)
Basin size	6,550 km2 (2,530 sq mi)
Discharge
• location	Abbeville
• average	35 m3/s (1,200 cu ft/s)

The Somme (UK: /sɒm/ SOM, US: /sʌm/ SUM,^[1][2] French: [sɔm] ^ⓘ) is a river in Picardy, northern France.

The river is 245 km (152 mi) in length, from its source in the high ground of the former Arrouaise Forest [fr] at Fonsomme near Saint-Quentin, to the Bay of the Somme, in the English Channel. It lies in the geological syncline which also forms the Solent. This gives it a fairly constant and gentle gradient where several fluvial terraces have been identified.^[3]