Uftjuga (Northern Dvina)

Uftjuga Уфтюга
Location of the Uftjuga in the catchment area of ​​the Northern Dvina
Data
Water code	RU :  03020300112103000025650
location	Arkhangelsk Oblast ( Russia )
River system	Northern Dvina
Drain over	Northern Dvina  → White Sea
source	west of Jarensk 62 ° 13 ′ 4 ″  N , 48 ° 5 ′ 0 ″  E
Source height	180  m
muzzle	Northern Dvina near Krasnoborsk Coordinates: 61 ° 33 ′ 11 "  N , 46 ° 13 ′ 37"  E 61 ° 33 ′ 11 "  N , 46 ° 13 ′ 37"  E
Mouth height	36  m
Height difference	144 m
Bottom slope	0.61 ‰
length	236 km
Catchment area	6300 km²
Discharge at the Jaruchino A Eo gauge : 3540 km² Location: 55 km above the mouth	MQ 1942/1988 Mq 1942/1988	35 m³ / s 9.9 l / (s km²)
Left tributaries	Motma , Topsa
Right tributaries	Lachoma
Communities	Komarowo , Kulikowo , Verkhnyaya Uftjuga , Beryosovonawolok
Navigable	72 km from Kulikowo

The Uftjuga ( Russian Уфтюга ) is a 236 kilometer long right tributary of the Northern Dvina in the north of the European part of Russia . It is not to be confused with several rivers of the same name in this region.

course

The Uftjuga rises in the southeast of the Arkhangelsk Oblast  - which it flows through along its entire length - not far from the border with the Komi Republic , 60 km west of the village of Jarensk at an altitude of about 180  m . It flows through a swampy taiga area in places , mainly in a south-westerly direction, parallel to the largest Dwina tributary, the Wytschegda, and particularly meandering in the lower reaches . It finally flows into the Peshchanski Poloi, a right arm of the Northern Dvina, not far from the village of Krasnoborsk at a height of 36  m .

The main tributaries of the Uftjuga are the Motma and Topsa from the left and the Lachoma from the right.

Hydrography

The Uftjuga catchment area covers 6300 km². Near the mouth, the river is over 50 meters wide and over a meter deep; the flow velocity here is 0.6 m / s.

Uftjuga freezes between the second half of October through November and the end of April through the first half of May. The water flow at Jaruchino , 55 kilometers above the estuary (and above the confluence of Topsa and Lachoma), is an annual average of 35.3 m³ / s with a minimum of 6.7 m³ / s in February and a maximum of 186 m³ / s in May.

Infrastructure and economy

The Uftjuga is navigable for 72 km from the village of Kulikowo for smaller vehicles and is used for logging.

The area through which the Uftjuga flows is sparsely populated, there are no cities. Only on the lower reaches are a number of small villages that belong to the rural settlements of Komarowo, Kulikowo, Verkhnyaya Uftjuga and Berjosowonawolok. Only in this area are there roads that are only partially paved.

Forestry plays an important role in the river's catchment area. For their purposes - the removal of wood to the rivers and the connection of places otherwise inaccessible by land or not accessible all year round - several narrow-gauge railways were built here, for example starting from Kulikowo (opened in 1954, length over 50 km, in operation in 2005) or from Settlement Slobodskoi (formerly Kwascha) across the tributary and the village of the same name Motma to Charitonowo on the Wytschegda (built starting from Charitonowo in the direction of the Nyuba river from 1931, from Slobodskoi 1968; connection of the two networks in 1975; length of the "main route" 72 km , plus many branches; in operation in 2006).

Individual evidence

1. ↑ ^{a b} Uftjuga (Northern Dvina) in the State Water Register of the Russian Federation (Russian)
2. ↑ ^{a b} Article Uftjuga in the Great Soviet Encyclopedia (BSE), 3rd edition 1969–1978 (Russian) }
3. ↑ ^{a b} Uftjuga at the Jaruchino gauge - hydrographic data at R-ArcticNET
4. ^ 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
5. ↑ Narrow-gauge railway Kulikowo on the private website of Sergei Bolashenko (Russian, photos)
6. ↑ Nyuba narrow-gauge railway on Sergei Bolashenko's private website (Russian)