Moma
Indigirka Basin
Location
Country	Russia
Physical characteristics
Source
• location	Lake Sisyktyah
• elevation	703 metres (2,306 ft)
Mouth	Indigirka
• coordinates	66°26′10″N 143°10′55″E / 66.43611°N 143.18194°E / 66.43611; 143.18194
• elevation	192 metres (630 ft)
Length	406 km (252 mi)
Basin size	30,200 km2 (11,700 sq mi)
Basin features
Progression	Indigirka→ East Siberian Sea

The Moma (Russian: Мома; Yakut: Муома, Muoma) is a river in Yakutia in Russia, a right tributary of the Indigirka. The length of the river is 406 kilometres (252 mi), the area of its drainage basin is 30,200 square kilometres (11,700 sq mi).^[1]

The extinct cinder cone volcanoes Balagan-Tas and Uraga-Tas are some of the main features of the Moma Natural Park.^[2]

Course

The Moma originates from Lake Sisyktyah on the northern slope of the Ulakhan Chistay Range, the highest subrange of the Chersky Range.^[3] The river flows in the wide intermontane basin separating the Ulakhan Chistay Range from the Moma Range in the north and flows into the Indigirka about 1,086 kilometres (675 mi) from its mouth.^[1]

There are black coal deposits in the river basin. The district centre – the village of Khonuu – is located at the mouth of the river.

Etymology

The name comes from the Evenki language, “мома” means "wood, timber, tree". This is the name for the rivers with steep, easy to wash banks that crumble together with trees growing on them, cluttering the river bed.

Hydrology

Rain, snow and ice feed the river. It freezes in October, the ice breaks up in late May – early June. In the middle and lower courses the river bed abounds rocky rapids, icing is typical. The average annual water consumption – 377 kilometres (234 mi) from the mouth – is 11.02 cubic metres per second (389 cu ft/s). The river is not navigable.

See also

• Balagan-Tas

References