- 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.
- It is one of the major north bank tributaries of the Brahmaputra river.
- The river is known as Mo-chu in Bhutan and Gangadhar in the plains of Assam beyond Srirampur.
- It originates from the snow-clad Greater Himalayan ranges of Tibet.
- The river is formed by the confluence of two major tributaries: the Mo Chhu and Pho Chhu, near the town of Punakha in Bhutan.
- As the Sankosh River flows into India, it forms the boundary between the states of Assam and West Bengal.
- It travels a distance of 214 km in Bhutan and 107 km in India.
- The river has numerous tributaries originating from the Himalayan ranges, contributing to its significant catchment area of 10,345 square kilometers.
- 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.