Allaicha
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Allaicha Аллаиха |
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 Location of the Allaicha in the catchment area of the Indigirka |
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| Data | ||
| Water code | RU : 18050000412117700067729 | |
| location | Sakha Republic ( Russia ) | |
| River system | Indigirka | |
| Drain over | Indigirka → Arctic Ocean | |
| source |
Polousny back 69 ° 56 ′ 1 ″ N , 143 ° 33 ′ 9 ″ E |
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| Source height | 80 m | |
| muzzle | in the Indigirka coordinates: 70 ° 31 '43 " N , 147 ° 42' 50" E 70 ° 31 '43 " N , 147 ° 42' 50" E |
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| Mouth height | 5 m | |
| Height difference | 75 m | |
| Bottom slope | 0.15 ‰ | |
| length | 513 km (including the source Eliktscheen: 563 km) | |
| Catchment area | 12,400 km² | |
| Left tributaries | Ot-Jurjach | |
| Navigable | Lower course (15 km) | |
The Allaicha ( Russian Аллаиха or Аллайха, translit. Allaicha or Allajcha, Jakut. Аллайыаха / Allajyacha) is a 563 km long left tributary of the Indigirka in the Sakha Republic (Yakutia) in the Russian Federation Far East .
The Allaicha arises in about 80 m on the northern flank of the Polousny Ridge from the small source rivers Fena (Фена) and Eliktscheen (Эликчээн). It then flows through the south-eastern part of the Jana Indigirka lowlands in a strongly meandering direction, initially in an easterly and later in a northeastern direction . Finally, the river flows into the Indigirka about 15 kilometers above the settlement of Tschokurdach (at a height of 5 m ). About 15 kilometers above a left branch of the Indigirka, Erge-Jurjach , flows into the Allaicha, which is navigable from here.
The catchment area of the Allaicha covers 12,400 km². Near the mouth, the main arm of the river is about 200 meters wide and 5 meters deep; the flow velocity is 0.6 m / s. The most important tributary is the 123 km long Ot-Jurjach from the left. In the catchment area there are about 4000 lakes with a total area of 765 km², especially in the lower reaches between Allaicha and Indigirka.
In winter, the allaicha freezes from the beginning of October to the end of May.
The entire course of the Allaicha is administratively located in the Ulus Allaicha, which is named after it .
swell
- SE Mostachow et al .: Jakutskaja ASSR . Jakutsk, 1980 (Russian)
Individual evidence
- ↑ a b Article Allaicha in the Great Soviet Encyclopedia (BSE) , 3rd edition 1969–1978 (Russian)
- ↑ a b Allaicha in the State Water Register of the Russian Federation (Russian)