Glomma

Glomma / Glåma
The Glomma at the Solbergfoss Hydroelectric Power Station
Map of the Glomma River watershed
Etymology	Old Norse, Glaumr, from raumr: "noise," "racket"
Location
Country	Norway
Physical characteristics
Source	Aursund
• location	Røros, Trøndelag, Norway
• coordinates	62°37′06″N 11°48′11″E / 62.61833°N 11.80306°E / 62.61833; 11.80306
• elevation	690 m (2,260 ft)
Mouth	Fredrikstad
• location	Fredrikstad, Østfold, Norway
• coordinates	59°13′04″N 10°55′51″E / 59.21778°N 10.93083°E / 59.21778; 10.93083
• elevation	0 m (0 ft)
Length	621 km (386 mi)
Basin size	42,000 km2 (16,000 sq mi)
Discharge
• average	720 m3/s (25,000 cu ft/s)
• maximum	4,700 m3/s (170,000 cu ft/s)
Basin features
Tributaries
• left	Vorma
• right	Rena
Designation
Ramsar Wetland
Official name	Glomådeltaet
Designated	12 November 2010
Reference no.	1954[1]

The Glomma, or Glåma, is Norway's longest and most voluminous river. With a total length of 621 kilometres (386 miles), it has a drainage basin that covers fully 13% of Norway's surface area, all in the southern part of the country.^[2]