Polui
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Polui Полу́й |
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 Location of the Polui (Полу́й) in the catchment area of the Ob |
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| Data | ||
| Water code | RU : 15020300112115300032323 | |
| location | Yamalo-Nenets Autonomous Okrug ( Russia ) | |
| River system | If | |
| Drain over | Whether → Arctic Ocean | |
| confluence | by Gluboki Polui and Suchoi Polui 65 ° 19 ′ 33 ″ N , 69 ° 34 ′ 15 ″ E |
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| Source height | 21 m | |
| muzzle | At Salekhard in the Ob coordinates: 66 ° 33 ′ 30 ″ N , 66 ° 33 ′ 0 ″ E 66 ° 33 ′ 30 ″ N , 66 ° 33 ′ 0 ″ E |
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| Mouth height | 2 m | |
| Height difference | 19 m | |
| Bottom slope | 0.05 ‰ | |
| length | 369 km | |
| Catchment area | 21,000 km² | |
| Discharge at the Glukharinoye A Eo gauge : 10,700 km² Location: 301 km above the estuary |
MQ 1977/1985 Mq 1977/1985 |
116 m³ / s 10.8 l / (s km²) |
| Discharge at the Polui A Eo gauge : 15,100 km² Location: 189 km above the mouth |
MQ 1953/1999 Mq 1953/1999 |
132 m³ / s 8.7 l / (s km²) |
| Discharge at the Yangy-Ugan A Eo gauge : 16,200 km² Location: 162 km above the mouth |
MQ 1948/1952 Mq 1948/1952 |
139 m³ / s 8.6 l / (s km²) |
| Left tributaries | Njakchoba , Bolshoi Jepsedei , Tjonjaju | |
| Right tributaries | Chadyjacha , Tanoptscha | |
| Flowing lakes | Bolshoi Poluiski Sor | |
| Medium-sized cities | Salekhard | |
| Navigable | 202 km | |
The Polui ( Russian Полу́й ; also Bolshoi Polui , so Great Polui ) is a 369 kilometers (with source river Gluboki Polui 635 kilometers) long right tributary of the Ob in the West Siberian lowlands in Russia .
course
The Polui arises at a height of 21 m in the northwest of the West Siberian Lowlands from the source rivers Gluboki Polui (Deep Polui) from the left and Suchoi Polui (Dry Polui) from the right. Both source rivers have their sources in the watershed area of the Siberian Ridge (Sibirskije Uwaly) at an altitude of 110 to 120 m , near the border with the Autonomous Okrug of the Khanty and Mansi / Ugra . The upper Polui and its source rivers initially run mainly in a northerly direction, the longer source river Gluboki Polui for several dozen kilometers also in an easterly direction. After the confluence, the Polui gradually turns in a north-westerly and finally westerly direction. In its wide, swampy valley with many lakes, the river meanders strongly along its entire length. The left bank of the entire lower course is flat, while the right, northern flank of the floodplain rises relatively steeply to over 100 m . About 20 km before its mouth, the Polui flows through the Bolshoi (Great) Poluiski Sor, which is up to 40 km² in size, depending on the water level. It finally flows into a right arm of the Ob, which is now more than two kilometers wide, directly at the town of Salekhard at a height of 2 m .
The Polui flows along its entire length through the territory of the Yamal-Nenets Autonomous Okrug .
The most important tributaries of the actual Polui are Chadyjacha and Tanoptscha from the right and Njakchoba, Bolshoi Jepsedei (Great Jepsedei) and Tjonjaju from the left. The Kedrowaja flows into the source river Gluboki Polui, and into the Sukhoi Polui the Bolshoi (Great) Chuljumjogan and the Bolshoi (Great) Sandibei, all from the right.
Hydrography
The catchment area of the Polui covers 21,000 km². In the vicinity of the mouth, the river is over 300 m wide and up to 8 m deep; the flow velocity here is 0.6 m / s.
The Polui freezes from October to May. The water flow in the vicinity of the mouth is about 170 m³ / s on average over the year, at the middle course 189 km above the mouth it is still 132 m³ / s with a minimum of 32.3 m³ / s in March and a maximum of 461 m³ / s in June.
Infrastructure and economy
The river is navigable for 202 km (above the Polui settlement to the mouth).
The area through which it flows is generally very sparsely populated. Besides the town of Salekhard at the mouth of the river, there are only a few small settlements from the middle reaches downwards. The natural gas and oil production areas of the Autonomous Okrug have not yet extended into the Polui catchment area; only different pipelines run here , for example through the headwaters of the Sukhoi Polui (from the production areas between Nadym and Novy Urengoy in the direction of the Urals ).
The right bank of the middle and lower reaches of the Polui follows at different distances, partly in the immediate vicinity, on over 200 kilometers of river the route of the Arctic Circle Railway, built under Stalin . This section of the route was one of those that were in regular operation for a short time. After the closure in 1955 and the abandonment of a parallel telephone line in 1976, only remnants of the line are left today. Reconstruction of the line is, however, regularly discussed. In sections, the car track from Salekhard to Nadym, which is only passable in winter due to the lack of bridges, follows the railway line.
Individual evidence
- ↑ a b Article Polui in the Great Soviet Encyclopedia (BSE) , 3rd edition 1969–1978 (Russian)
- ↑ a b Polui in the State Water Register of the Russian Federation (Russian)
- ↑ Polui at the Glukharinoye gauge - hydrographic data from R-ArcticNET
- ↑ a b Polui at the Polui gauge - hydrographic data at R-ArcticNET
- ↑ Polui at the Yangy-Ugan gauge - hydrographic data from R-ArcticNET
- ^ List of Inland Waterways of the Russian Federation (confirmed by Order No. 1800 of the Government of the Russian Federation of December 19, 2002); on-line