geo.wikisort.org - Reservoir

Abraham Lake, also known as Lake Abraham, is an artificial lake and Alberta's largest reservoir. It is located in the "Kootenay Plains area of the Canadian Rockies' front range", on the North Saskatchewan River in western Alberta, Canada.[1]

Abraham Lake
Lake on the North Saskatchewan River
Abraham Lake
Location	Clearwater County, Alberta
Coordinates	52°13′25″N 116°25′38″W
Type	Reservoir
Etymology	Silas Abraham
Primary inflows	North Saskatchewan River
Primary outflows	North Saskatchewan River
Basin countries	Canada
Max. length	32 km (20 mi)
Max. width	3.3 km (2.1 mi)
Surface area	53.7 km2 (20.7 sq mi)
Max. depth	4,335 ft (1,321 m) (above sea level)
Surface elevation	1,340 m (4,400 ft)

Description

Abraham Lake has a surface area of 53.7 km² (20.7 sq mi) and a length of 32 km (20 mi).[2] Although man-made, the lake has the blue color of other glacial lakes in the Rocky Mountains, which is caused by rock flour.[3]

Abraham Mountain, Elliott Peak, and the Cline River Heliport are located on the western shore of the lake. Mount Michener is situated on the eastern shore. Mount Ernest Ross lies at the southern tip of the lake.

History

Abraham Lake was created by the former Calgary Power Company, now TransAlta, in 1972, with the construction of the Bighorn Dam.[4] Planning of the dam involved no evaluation of the social and environmental effects it may have caused and no public hearings were held prior to the construction. Construction of the Bighorn Dam flooded the Kootenay Plains and stopped the livelihood (hunting and fur trapping) of the Bighorn band of the Stoney Nakoda First Nation that had lived in that area.  It had flooded their cabins, graves and pastures.[5]

The lake was built on the upper course of the North Saskatchewan River, in the foothills of the Canadian Rockies, and lines David Thompson Highway between Saskatchewan River Crossing and Nordegg.

The Government of Alberta sponsored a contest to name the lake in February 1972, during the final stages of construction of the Bighorn Dam. Students across the province were asked to submit names taking into consideration "historical significance, prominent persons, geography and topography, and the value of the lake."[6] It was eventually named after Silas Abraham (c. 1870–1964), of the Stoney Nakoda First Nation and originally from Morley, Alberta.[7] He was farmer and hunter who lived in the Kootenay Plains and later on the Big Horn 144A reserve.[8][9]

Phenomenon

Trapped methane causes frozen bubbles to form under the ice on the lake's surface. This phenomenon results when decaying plants on the lake bed release methane gas, which creates bubbles that become trapped within the ice, in suspended animation, just below the surface as the lake begins to freeze. The visual effects formed by the resulting stacks of bubbles, frozen while rising toward the surface, combined with the clear blue water, have made Abraham Lake a popular destination for photographers and nature observers.[10][11] The ice coverage of the lakes varies throughout the winter. It usually freezes by the end of December but did not freeze until January in 2020.

See also

• Lakes of Alberta

References

External links

• Media related to Abraham Lake at Wikimedia Commons

На других языках

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[de] Abraham Lake (North Saskatchewan River)

Der Abraham Lake ist ein Stausee des North Saskatchewan River im Clearwater County im Westen der kanadischen Provinz Alberta. Er ist der größte künstlich angelegte See in Alberta.

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- [en] Abraham Lake

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[fr] Lac Abraham

Le lac Abraham, en anglais : Abraham Lake, est un lac artificiel sur la rivière Saskatchewan Nord à l'ouest de l'Alberta au Canada. Le lac Abraham a une superficie de 53,7 km2 et une longueur de 32 km.

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[it] Lago Abraham

Il lago Abraham è un bacino artificiale sul fiume North Saskatchewan nella provincia canadese dell'Alberta, Canada. Ha una superficie di 53.7 km² e una lunghezza di 32 km.

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[ru] Эйбрахам

Эйбрахам (англ. Abraham Lake) — водохранилище, созданное в 1972 году при строительстве плотины на реке Норт-Саскачеван в западной Альберте, Канада. Площадь — 53,7 км². Расположено на высоте 1340 метров и имеет максимальную длину 32 км, а ширину до 3,3 км, — являясь крупнейшим водоёмом на равнине Кутеней[1].

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