Barak, Lohit and Subansiri are all rivers that flow through Arunachal Pradesh, a state in northeast India. The Barak River is a major river in the region and flows through the southern part of Arunachal Pradesh before entering the neighboring state of Assam. The Lohit River is a major tributary of the Brahmaputra River and flows through the eastern part of Arunachal Pradesh. The Subansiri River is another major tributary of the Brahmaputra River and flows through the central part of Arunachal Pradesh.