Great Bear River

Great Bear River (Sahtúdé)
Great Bear River exits Great Bear Lake near Deline
Country Canada
Source
 - location Great Bear Lake, Northwest Territories, Canada
 - elevation 186 m (610 ft)
 - coordinates 65°08′03″N 123°30′45″W / 65.13417°N 123.51250°W / 65.13417; -123.51250
Mouth Mackenzie River
 - location Tulita, Northwest Territories, Canada
 - elevation 60 m (197 ft)
 - coordinates 64°54′21″N 125°36′12″W / 64.90583°N 125.60333°W / 64.90583; -125.60333Coordinates: 64°54′21″N 125°36′12″W / 64.90583°N 125.60333°W / 64.90583; -125.60333
Length 113 km (70 mi)
Basin 156,500 km2 (60,425 sq mi)
Discharge for Mackenzie River[1]
 - average 528 m3/s (18,646 cu ft/s)
 - max 995 m3/s (35,138 cu ft/s)
[2][3]

The 113-kilometre (70 mi) long Great Bear River, which drains the Great Bear Lake westward through marshes into the Mackenzie River, forms an important transportation link during its four ice-free months. It originates at south-west bay of the lake. The river has irregular meander pattern 350-metre (1,150 ft) wide channel with average depth 6 metres (20 ft). Historic air photos show no evidence of bank erosion or channel migration in a 50-year period.

The low discharge rate is due to small amount of precipitation in watershed area.[4] Great Bear River contained open reaches that had melted out in place over 80 percent of its length in 1972 and 1974.[1]

The settlement of Tulita is located at the mouth of the river.

Tributaries

The tributaries of the Great Bear River include;[3]

See also

References

  1. 1 2 HARE INDIAN RIVER. TABLE 6-1 Great Bear River
  2. ↑ "Natural Resources Canada-Canadian Geographical Names (Great Bear River)". Retrieved 2014-12-21.
  3. 1 2 "Atlas of Canada Toporama". Retrieved 2014-12-21.
  4. ↑ Maps of Canada Annual Precipitation
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