The Brahmaputra River, one of the major rivers in India, receives several tributaries that significantly contribute to its flow and ecological dynamics. The Dibang, Kameng, and Lohit rivers are all important tributaries in the northeastern region, each originating from the Himalayas and flowing into the Brahmaputra. Understanding the hydrology and tributary systems of major rivers like the Brahmaputra is crucial for UPSC aspirants, as it relates to topics in geography, environmental studies, and the socio-economic impacts of river systems in the region. The interconnectedness of these rivers also highlights their role in regional biodiversity and potential challenges related to flood management and water resource allocation.