The state of Assam faces severe annual floods primarily from which river system?

The correct answer is Brahmaputra . Key Points The Brahmaputra river system is the primary driver of annual flooding in the state of Assam , as it passes through a narrow valley that is roughly 80 kilometers wide and 1,000 kilometers long. This river originates from the Chemayungdung glacier of the Kailas range near Mansarovar Lake and flows eastward through Tibet as the Yarlung Tsangpo before entering India. Upon entering Arunachal Pradesh as the Siang or Dihang , it joins the Dibang and Lohit rivers to form the main Brahmaputra in the plains of Assam . The region receives heavy rainfall during the Southwest Monsoon (June to September), causing the river to carry massive volumes of water and sediment , which leads to siltation and frequent bank erosion . The Brahmaputra is known as a braided river throughout most of its course in Assam , creating numerous river islands like Majuli , which are highly susceptible to submergence. Additional Information Ganga : It is the largest river basin in India, flowing through states like Uttarakhand , Uttar Pradesh , Bihar , and West Bengal . It does not flow through Assam , but it merges with the Brahmaputra in Bangladesh to form the Padma and finally the Meghna . Godavari : Known as the Dakshina Ganga or Vriddha Ganga , it is the largest river in Peninsular India . It originates at Trimbakeshwar in Maharashtra and flows through Telangana and Andhra Pradesh . Narmada : It is a major west-flowing river that originates from the Amarkantak plateau in Madhya Pradesh . It flows through a rift valley between the Vindhya and Satpura ranges, draining into the Arabian Sea via the Gulf of Khambhat .