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A 352-km transboundary river rising in Nagaland and joining the Brahmaputra in Assam, flowing between the Dhansiri Reserved Forest and Intanki National Park.
The Dhansiri is a transboundary river flowing through the states of Nagaland and Assam, and an important tributary of the Brahmaputra. It rises from the Laisang Peak in Nagaland, flows past Dimapur and Golaghat, and finally joins the Brahmaputra at Dhansirimukh in Assam. With a total length of 352 km, it drains a catchment of 1,220 square kilometres. Along the Nagaland-Assam border it flows between two protected areas — the Dhansiri Reserved Forest on one side and Intanki National Park on the other — and it features regularly in Assam's flood advisories.
Type: PhenomenonSource — the Laisang Peak in Nagaland.
Course — flows north-westerly for the first 40 km, then north-east for about 76 km up to Dimapur, then generally northerly to Golaghat in Assam, where it turns abruptly north-west.
Confluence — joins the Brahmaputra at Dhansirimukh in Assam.
Total length — 352 km; catchment area 1,220 square kilometres.
Major tributaries — the Intaki, Bara Monglu, Langlong Nadi and Amaluma Jan.
Protected areas — flows along the Nagaland-Assam border with the Dhansiri Reserved Forest on one side and Intanki National Park on the other.
Flood relevance — the Assam State Disaster Management Authority issues advisories for residents near the Dhansiri in Golaghat district during flood events.
Frequency: Rivers of North East India and Brahmaputra tributaries appear frequently in UPSC Prelims geography and in SSC and railway general awareness.
Laisang Peak, Nagaland
352 km
1,220 square kilometres
Joins the Brahmaputra at Dhansirimukh, Assam
Nagaland and Assam
Intaki, Bara Monglu, Langlong Nadi, Amaluma Jan
Dimapur (Nagaland) and Golaghat (Assam)
The Dhansiri is significant on three counts. Ecologically, it forms a corridor between the Dhansiri Reserved Forest and Intanki National Park, so the river and its banks support the connectivity that allows wildlife to move between protected areas — a factor in elephant movement across the Assam-Nagaland landscape. Hydrologically, it is one of the tributaries that feed the Brahmaputra's enormous discharge, and its own flooding regularly prompts advisories from the Assam State Disaster Management Authority in Golaghat district. Administratively, its course along the Nagaland-Assam boundary means that questions of river management, siltation and encroachment become inter-state matters, which is why the river appears in discussions of the long-standing Assam-Nagaland boundary issue as well as in flood management.
Dhansiri — transboundary river of Nagaland and Assam, tributary of the Brahmaputra.
Rises at Laisang Peak, Nagaland; joins the Brahmaputra at Dhansirimukh, Assam.
Length 352 km; catchment area 1,220 square kilometres.
Flows past Dimapur and Golaghat.
Tributaries: Intaki, Bara Monglu, Langlong Nadi, Amaluma Jan.
Flanked by the Dhansiri Reserved Forest and Intanki National Park.
It originates from the Laisang Peak in Nagaland and joins the Brahmaputra at Dhansirimukh in Assam, after a course of 352 km.
Intanki National Park in Nagaland lies along its course, with the Dhansiri Reserved Forest on the other side of the river.
The Intaki, Bara Monglu, Langlong Nadi and Amaluma Jan rivers.
The river runs through Golaghat district in Assam, and the Assam State Disaster Management Authority issues advisories for residents living near it during flood events.