|Lake type||Glacial lake|
|Primary outflows||Jampali (through sinkholes)|
|Catchment area||153 km2 (59 sq mi)|
|Basin countries||Georgia, (Abkhazia)|
|Built||3 October 1891|
|Max. length||2.4 km (1.5 mi)|
|Surface area||0.58 km2 (0.22 sq mi)|
|Max. depth||65 m (213 ft)|
|Surface elevation||512 m (1,680 ft)|
Lake Amtkeli or Amtkel (Abkhazian: Амтҟьал; Georgian: ამტყელის ტბა; Russian: Амткел) is a lake in the Gulripshi District of Abkhazia, Georgia that was formed on 3 October 1891 when an earthquake caused a landslide on the south-western slope of Mt. little Shkhapach into the valley of the Amtkeli River.
Lake Amtkeli is fed by the Amtkeli River, but only a small part of its water percolates through the obstructing rubble back into the river. The greater part leaves the lake through underground passages to the Jampal River. Due to the lake's limited discharge capacity, its water level rises strongly during snowmelt in May, leading to annual fluctuations of up to 40 m (131 ft) in the lake's average 512 m (1,680 ft) height above sea level and 65 m (213 ft) maximal depth, and increasing its length from 2.4 km (1.5 mi) to 4 km (2.5 mi). The average surface area of Lake Amtkeli is 0.58 km2 (0.22 sq mi), and its drainage basin measures 153 km2 (59 sq mi).
Due to the lake's origin, its underwater slopes are steep, following the surface slopes.
In July and August, the lake's average surface temperature is 20 °C (68 °F), in Winter it rarely freezes over.
- Abkhazia is the subject of a territorial dispute between the Republic of Abkhazia and Georgia. The Republic of Abkhazia unilaterally declared independence on 23 July 1992, but Georgia continues to claim it as part of its own sovereign territory. Abkhazia has received formal recognition as an independent state from 7 out of 193 United Nations member states, 2 of which have subsequently withdrawn their recognition.
- "Lake Amtkel", page 63, A Checklist of the Ground-beetles of Russia and Adjacent Lands
- Solonenko, V.P. (1979). "Mapping the After-Effects of Disastrous Earthquakes and Estimation of Hazard for Engineering Constructions" (PDF). Bulletin of the International Association of Engineering Geology. Krefeld. 19: 138–142. doi:10.1007/bf02600466. Retrieved 17 February 2010.
- Озеро, рожденное обвалом (in Russian). bluekaz.ru. 2009. Retrieved 18 February 2010.[permanent dead link]
- Bondyrev, I. V.; Z. K. Tatashidz; V. P. Singh; E. D. Tsereteli; A. Yilmaz (2004). "Impediments to the Sustainable Development of the Caucasus-Pontdes Region". Journal of Comparative Social Welfare. London: Routledge. 20 (1): 33–48. doi:10.1080/17486830408417009. Retrieved 16 February 2010.