Nyamjang Chu

The Nyamjang Chu river originates in the snow-clad peaks of the eastern Himalayas, north of Taga in the Chudromo township of the Tsona County, at an elevation of 5,400 m (17,700 ft).

[5][6] From this location, Nyamjang Chu flows southwards for about 85 kilometres (53 mi) in Tibet,[1] passing by several towns such as Chudromo, Dongkar, Gongri, Kyipa, Marmang and Le.

South of Le (also spelt Lei and Lai), the river enters India at a location called Khinzemane at an elevation of 2,220 m (7,280 ft).

[8] The river flows mostly southwards in India for 40 km and joins the west-flowing Tawang Chu near Lumla.

[1] The Zemithang valley is one of the wintering locations for the black-necked crane, a vulnerable species of which only 4,000 are believed to be alive as of 1996.

The course of Namjyang Chu mapped by Bailey and Morshead in 1913 (Tributaries Namka Chu and Sumdorong Chu not shown)