Great Chukochya
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Big Chukotschja Больша́я Чуко́чья (Bolschaja Tschukotschja) |
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| Data | ||
| Water code | RU : 18060000112117700075229 | |
| location | Sakha Republic ( Russia ) | |
| River system | Great Chukochya | |
| origin | Lake Ussun Kjujol 68 ° 2 ′ 56 ″ N , 155 ° 41 ′ 33 ″ E |
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| Source height | 44 m | |
| muzzle |
Kolyma Bay ( East Siberian Sea ) Coordinates: 70 ° 5 ′ 41 ″ N , 159 ° 55 ′ 37 ″ E 70 ° 5 ′ 41 ″ N , 159 ° 55 ′ 37 ″ E |
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| Mouth height | 0 m | |
| Height difference | 44 m | |
| Bottom slope | 0.06 ‰ | |
| length | 758 km | |
| Catchment area | 19,800 km² | |
| Left tributaries | Oljor, Semyon-Jurjach | |
| Right tributaries | Sawwa-Jurjach | |
The Great Chukotschja ( Russian Больша́я Чуко́чья , Bolschaja Tschukotschja ; also Chukotschja ; alternatively Yakut Рэвум-Рэву , Rewum-Rewu ) is a 758 km long tributary of the East Siberian Sea in northeastern Russia .
course
The Great Chukotschja flows beyond the Arctic Circle at a height of 44 m from Lake Ussun-Kjujol in a north-westerly direction. In the first kilometers the river crosses about ten other lakes, including Tjorjut, Tanka and Gojon-Ujalach. The lakes are located in the southwestern part of the Kolyma lowlands , about 100 kilometers northeast of the small town of Srednekolymsk on the left bank of the Kolyma . This river , whose valley is separated from the lake area in this area by a flat terminal moraine , flows past just 20 kilometers from the origin of the Great Chukotschja.
The Great Chukotschja continues to flow through the swampy and lake-rich Kolyma lowlands along its entire length. Here meanders of the river extremely strong. The vegetation of the area consists initially of forest tundra , from the middle reaches of tundra . The river finally flows into the western part of the Kolyma Bay of the East Siberian Sea with an estuary more than two kilometers wide . Above the estuary, the Great Chukotschja is 200 to 300 meters wide and over two meters deep; the flow velocity is 0.2 m / s. About 70 kilometers of the lower reaches of the Great Chukotschja are under the influence of tides .
Its most important tributaries are the Oljor (length 229 km) and Semjon-Jurjach (121 km) from the left and the Sawwa-Jurjach (106 km) from the right. In the Great Chukotschja Basin there are around 11,500 lakes, the total area of which makes up 18.2% of the catchment area (corresponding to 3600 km²).
The name Chukotschja also bears the left (western) of the great estuary arms of the Kolyma, about 50 kilometers southeast of the Great Chukotschja into the East Siberian Sea.
Hydrology
The catchment area of the river covers 19,800 km². The Great Chukotschja freezes over between late September / early October and May / early June, and at times it freezes right through to the bottom.
Use and infrastructure
The Great Chukotschja is navigable in the lower reaches, but is not used for inland navigation because the area through which it flows is very sparsely populated. The population density of the Ulusse ( Rajons ) Srednekolymsk and Nizhnekolymsk through which it flows is only 0.08 and 0.06 inhabitants per km², respectively. The only settlement on the river is Chukotschja (a former trading post ) on the left bank of the lower reaches, a good ten kilometers above the mouth. It belongs to the Nasleg (municipality) Pochodsk and in 2001 had only three permanent residents. There is no traffic infrastructure in the area.
Individual evidence
- ↑ a b Article Great Chukotschja in the Great Soviet Encyclopedia (BSE) , 3rd edition 1969–1978 (Russian)
- ↑ a b Great Chukotschja in the State Water Register of the Russian Federation (Russian)
- ↑ Great Chukotschja ( Memento from April 5, 2008 in the Internet Archive ) in the Yakutia Geographical Manual (website of the Ministry of Nature Conservation of the Sakha Republic (Yakutia); Russian)
- ↑ Nasleg Pochodsk ( Memento of 19 November 2010 at the Internet Archive ) of the Rajons Nischnekolymsk on the website of the Center for Socio-economic and political monitoring of the Yakut State University (Russian)