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| Dihing River | |
|---|---|
| Name | Dihing |
| Other name | Burhi Dihing |
| Country | India |
| State | Assam |
| Length km | 380 |
| Source | Patkai Hills |
| Mouth | Brahmaputra |
| Basin countries | India |
Dihing River
The Dihing River is a major tributary of the Brahmaputra River in the Indian state of Assam. Rising in the Patkai Hills near the Nagaland border, it flows westward across the Upper Assam plains before joining the Brahmaputra near Dibrugarh. The river has played roles in regional Assam Movement history, inland navigation, and the ecology of the Kaziranga National Park floodplain.
The name "Burhi Dihing" and variants draw from Assamese and regional Tibeto-Burman languages spoken by communities such as the Ahom people, Mising people, and Naga people. Historical accounts from the Ahom kingdom era and colonial records in the Gazetteer of Assam reference the river under multiple orthographies used by British India administrators like officers of the East India Company and the Imperial Gazetteer of India. Travelers and surveyors including members of the Survey of India documented maps linking the river to place names along colonial tea plantations and stations such as Sadiya and Dibrugarh.
The river originates in the Patkai Range near Nagaland and flows through districts of Dibrugarh district, Tinsukia district, and Sivasagar district before its confluence with the Brahmaputra near Dibrugarh. Along its course it passes close to towns and landmarks including Margherita, Tinsukia, Naharkatia, and the oil town of Oil India Limited operational areas. The channel historically shifted across the Upper Assam floodplain, influencing the morphology around the Lohit River and the Subansiri River confluence network. The river valley lies within biogeographic zones catalogued by the Ministry of Environment, Forest and Climate Change and intersects transportation corridors such as the National Highway 37 and branch lines of the Indian Railways.
Principal tributaries and feeder streams include rivers and rivulets originating from the Hills and foothills of Nagaland and Arunachal Pradesh, many named in local records and surveyed by the Central Water Commission. Hydrological patterns reflect monsoonal input from the Bay of Bengal depression tracks and orographic rainfall associated with the Patkai system. The Dihing basin hydrology is linked to groundwater regimes monitored by the Central Ground Water Board and has been subject to flood mapping by the North Eastern Space Application Centre and agencies such as the India Meteorological Department.
The river corridor supports floodplain ecosystems contiguous with protected areas including Dehing Patkai National Park and migratory habitats relevant to the Brahmaputra basin. Riparian vegetation comprises species recorded in floras compiled by the Botanical Survey of India and supports fauna listed in inventories by the Zoological Survey of India, including metapopulations of Bengal tiger, Indian elephant, Gaur, and riverine avifauna monitored by organizations such as the Bombay Natural History Society and the Wetlands International. Aquatic biodiversity includes fish species catalogued by the Central Inland Fisheries Research Institute, and the floodplain plays roles for amphibian and reptile assemblages noted by researchers from institutions like Assam University and the Gauhati University.
Communities along the Dihing include ethnic groups such as the Ahom people, Mising people, Deori people, and Naga communities; their oral histories and chronicles like the Buranjis reference settlements, riverine trade, and conflicts. The river corridor was a theatre for movements during the colonial era involving the Tea Planters' Association of Assam and transport networks used by Steam navigation operators. Cultural sites and festivals tied to riverine livelihoods involve rituals maintained by denominations such as Vaishnavism institutions associated with Srimanta Sankardeva's heritage and local temple complexes in towns like Sibsagar and Dibrugarh.
The Dihing supports irrigation schemes catalogued by the Irrigation Department of Assam and water abstraction for agro-commodities including rice and tea estates linked to companies historically registered with the Chamber of Commerce in Dibrugarh. Energy and resource extraction in the basin include oilfields operated by Oil India Limited and mining activities with oversight from the Ministry of Petroleum and Natural Gas and the Directorate General of Mines Safety. River crossings and infrastructure include road bridges on National Highways, rail bridges on Indian Railways divisions, and ferry services regulated by the Assam State Transport Corporation.
The Dihing basin faces threats from sedimentation, bank erosion, floodplain conversion for plantations, and pollution from industrial and extractive operations overseen by regulatory bodies such as the Central Pollution Control Board and the State Pollution Control Board, Assam. Conservation initiatives by the Forest Department, Assam, nongovernmental organizations like the World Wide Fund for Nature and local conservationists working with agencies including the United Nations Development Programme aim to protect habitats contiguous with Dehing Patkai National Park and to implement river basin management plans promoted by institutions such as the National River Conservation Directorate. Scientific studies by universities and national laboratories inform policy dialogues at forums convened by the Ministry of Environment, Forest and Climate Change and regional planning bodies.
Category:Rivers of Assam Category:Tributaries of the Brahmaputra River