Water is a defining geographical and ecological feature of the Tinsukia district, shaping both its landscape and local livelihoods.
* **The Brahmaputra River:** The mighty river skirts the northern boundaries of the district, offering a lifeline for local ecology and transport. * **Dibru River:** A major tributary that acts as a natural border for the Dibru-Saikhowa National Park. * **Lohit River:** A vibrant, fast-flowing river that travels through the region before merging with others to form the Brahmaputra. * **Wetlands (Beels):** The region is dotted with numerous *beels* (floodplain lakes), with the Maguri Motapung Beel being the most prominent, serving as a vital resource for local fishing communities and wildlife conservation.
