Lake Chebarkul

Lake Chebarkul (Russian: озеро Чебаркуль) is a lake in Chebarkulsky District, Chelyabinsk Oblast, Russia, on the slopes of the southern Urals. The town of Chebarkul lies on its eastern shore, and Chelyabinsk, the administrative center of Chelyabinsk Oblast, is located about 70 kilometres (43 mi) to the northeast. The name of the lake, and the city of the same name, comes from Turkic and means "Beautiful, colorful lake."[2]

Chebarkul Lake
озеро Чебаркуль
Lake Chebarkul located within the Ob River watershed
LocationChelyabinsk Oblast, Russia
Coordinates54.96°N 60.3294444°E / 54.96; 60.3294444
Primary inflowsElovka River
Primary outflowsKoelga River, a small tributary of the Tobol[1]
Catchment area169 km2 (65 sq mi)[1]
Basin countriesRussia
Surface area19.8 km2 (7.6 sq mi)[1]
Max. depth12 m (39 ft)
Water volume0.154 km3 (125,000 acre⋅ft)
Surface elevation320 m (1,050 ft)[2][3]
FrozenNovember until April
Islands7
SettlementsChebarkul

Mostly fed by snowmelt from mountain streams, the lake freezes in November and stays icebound until April. The lake is the source of the Koelga River, which in turn flows into the Uvelka, Uy, Tobol, Irtysh, and Ob Rivers. The Ob finally empties into the Arctic Ocean.

There are several wooded islands, including Grachev, Golets, the Ribatskies, and Korablik Islands. The Krutik, Marin and Nazarychev peninsulas extend into the lake. Rest homes and sanatoria are located on the shores.[2] Lake Chebarkul is the largest of several lakes in the region, which collectively take on the name "Chebarkulsky lakes."

Fish that can be found in the lake include tench, carp, crucian carp, bream, pike, and perch.[2]

2013 Chelyabinsk meteorite impact

On 15 February 2013, local fishermen found a hole in the ice where a large fragment from the 2013 Russian meteor event likely struck the frozen lake.[4][5] The hole was circular, and about 6 metres (20 ft) across.[6] Police immediately cordoned off this site, as well as one other possible impact site in the area of the lake,[4] but scientists and interested people streamed to the area to investigate.[7]

In the days after the impact, black fragments of rock were found around the hole, which scientists from Ural Federal University suspect are meteorite fragments, and composed of about 10% iron.[8][9] Months later, divers found a large meteorite fragment on the lakebed, and it was dredged to the surface on October 16, 2013. This fragment weighed about 570 kilograms (1,260 lb).[10]

Further reading

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gollark: What? Why does it say it's doing a sequential scan now? Æ all is bee.
gollark: Slower, even.
gollark: Oops, it turns out I'm accidentally sorting by it instead of the rank, but it's equally slow after fixing that.
gollark: ```nonlocality=# EXPLAIN ANALYZE SELECT url, ts_rank(fts, query), ts_headline(fts::text, query, 'MaxWords=60') AS rank FROM pages, websearch_to_tsquery('bee') query WHERE fts @@ query ORDER BY rank LIMIT 1; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------------------------- Limit (cost=860.92..860.92 rows=1 width=96) (actual time=8506.425..8506.427 rows=1 loops=1) -> Sort (cost=860.92..861.05 rows=52 width=96) (actual time=8506.423..8506.425 rows=1 loops=1) Sort Key: (ts_headline((pages.fts)::text, query.query, 'MaxWords=60'::text)) Sort Method: top-N heapsort Memory: 25kB -> Nested Loop (cost=688.65..860.66 rows=52 width=96) (actual time=1.362..8505.403 rows=348 loops=1) -> Function Scan on websearch_to_tsquery query (cost=0.25..0.26 rows=1 width=32) (actual time=0.023..0.025 rows=1 loops=1) -> Bitmap Heap Scan on pages (cost=688.40..846.49 rows=52 width=142) (actual time=0.353..1.502 rows=348 loops=1) Recheck Cond: (fts @@ query.query) Heap Blocks: exact=231 -> Bitmap Index Scan on page_search_index (cost=0.00..688.39 rows=52 width=0) (actual time=0.320..0.320 rows=387 loops=1) Index Cond: (fts @@ query.query) Planning Time: 0.190 ms Execution Time: 8506.463 ms(13 rows)```

References

  1. "Lake Chebarkul". State Water Register (in Russian). Archived from the original on 28 September 2013. Retrieved 17 February 2013.
  2. Official site of Chebarkul Archived 2011-09-03 at the Wayback Machine. Retrieved February 17, 2013. In Russian.
  3. Cherbarkul (Lake) - an article in the Great Soviet Encyclopedia. (In Russian, retrieved 2013-02-17.)
  4. "Meteorite hits Russian Urals: Fireball explosion wreaks havoc, over 900 injured (phots, video)". RT. Retrieved 15 February 2013.
  5. "Meteorite fell into Chebarkul lake – Russian governor". The Voice of Russia. 15 February 2013. Archived from the original on 18 February 2013. Retrieved 15 February 2013.
  6. Englund, Will (15 February 2013). "Meteorite injures more than 900 in Russian city". Washington Post. Retrieved 15 February 2013.
  7. "Chelyabinsk meteor lake to become a must-see". Voice of Russia, RIA, TASS, Interfax, RT. Retrieved February 18, 2013.
  8. "Stay away from meteorites, government tells Russians". Space Daily. Moscow. AFP. 15 February 2013. Retrieved 17 February 2013.
  9. Kramer, Andrew E.; Barry, Ellen (February 18, 2013). "Russian Scientists Say They Found Meteorite Fragments". New York Times. Retrieved February 18, 2013. News story contains photographs of meteorite fragments.
  10. "Huge half-ton chunk of Russian meteorite lifted from lakebed". 16 October 2013. Retrieved 13 November 2013.
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