The Sankosh River originates from the snow-clad Greater Himalayan ranges of Tibet.
In Bhutan, it is formed by the confluence of two major tributaries, the Mo Chhu and Pho Chhu, near the town of Punakha.
Course Through Bhutan and India:
The Sankosh River is one of the major rivers of Bhutan and India.
It flows through Bhutan and then enters India where it joins the Brahmaputra River in the state of Assam.
The river, known as Mo-chu in Bhutan, travels a distance of 214 km through the country before entering India, where it is called Gangadhar in the plains of Assam beyond Srirampur.
As the Sankosh River crosses into India, it forms the boundary between the states of Assam and West Bengal and flows for 107 km within India.
Tributaries:
The Sankosh River has numerous tributaries originating from the Himalayan ranges.
It is one of the major north bank tributaries of the Brahmaputra River, eventually joining it in the state of Assam.
Catchment Area:
The Sankosh River has a significant catchment area of 10,345 square kilometers.
Geographical Features and Flooding:
The Sankosh River traverses various landscapes, including narrow gorges with steep gradients in its upper reaches, and then transitions to flatter slopes as it nears the Indo-Bhutan border.
The lower reaches of the river, extending to Srirampur, are prone to annual flooding.
Ecological Significance:
The Sankosh River is one of the major rivers that flows through the Buxa Tiger Reserve, highlighting its ecological importance.