Namana

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Namana
Намана
Data
Water code RU :  18030500112117200027777
location Sakha Republic (Yakutia) ( Russia )
River system Lena
Drain over Lena  → Arctic Ocean
confluence of Usttach and Orgui
62 ° 20 '5 "  N , 120 ° 20' 58"  O
Source height 252  m
muzzle in the Lena coordinates: 60 ° 39 ′ 7 ″  N , 121 ° 13 ′ 29 ″  E 60 ° 39 ′ 7 ″  N , 121 ° 13 ′ 29 ″  E
Mouth height 121  m
Height difference 131 m
Bottom slope 0.31 ‰
length 422 km (444 km with source rivers)
Catchment area 16,900 km²
Discharge at the Mjakinda
A Eo gauge : 16,600 km²
Location: 35 km above the mouth 		MQ 1944/1999
Mq 1944/1999
 		31.87 m³ / s
1.9 l / (s km²)
Left tributaries Bes-Jurjach , Ulachan-Arbai , Kejikte
Right tributaries Sarsan
Course of the Namana (Намана) in the catchment area of ​​the Lena (yellow)

Course of the Namana (Намана) in the catchment area of ​​the Lena (yellow)

The Namana ( Russian and Yakut Намана ) is a 422 km (444 km with headwaters) long left tributary of the Lena in the Republic of Sakha (Yakutia) in Russia .

The Namana built on the Lena Plateau , nearly 500 km in a straight line west of Republic capital Yakutsk from both 22 km long headwaters Usttach from the left and from the right Orgui. It flows increasingly meandering , partly in a narrow valley, the Lena plateau in a south to south-south-east direction until it finally flows into the Lena about 50 km northeast of the city of Oljokminsk , immediately below the village of Balagannach .

The catchment area of the river covers 16,900 km². By far the longest tributary is the 276 km long Kejikte, which flows into the middle reaches from the left . Others are Bes-Jurjach (72 km) and Ulachan-Arbai (73 km) from the left and Sarsan (84 km) from the right.

The discharge 35 km above the mouth is an annual mean of 31.87 m³ / s, with a maximum monthly mean of 218 m³ / s in May. Between November and April the mean monthly discharge is below 3 m³ / s, from January to March below 1 m³ / s.

Individual evidence

  1. ↑ Soviet General Staff Map 1: 200,000. Sheet P-51-XIII, XIV. Edition 1987
  2. ↑ Soviet General Staff Map 1: 200,000. Sheet P-51-XXXI, XXXII. Edition 1990
  3. ↑ a b c d Namana in the State Water Directory of the Russian Federation (Russian)
  4. ↑ a b c d Article Namana in the Great Soviet Encyclopedia (BSE) , 3rd edition 1969–1978 (Russian)http: //vorlage_gse.test/1%3D079919~2a%3DNamana~2b%3DNamana
  5. ↑ a b Namana at the Mjakinda gauge - hydrographic data from R-ArcticNET