The Bay of Bengal occupies an breadth of 2,172,000 km². A cardinal of ample rivers – Padma (distributary of Ganges), Meghna (distributary of Brahmaputra), Jamuna (branch of Brahmaputra, Ayeyarwady, Godavari, Mahanadi, Krishna and Kaveri – breeze into the Bay of Bengal. Among the important ports are Cuddalore, Chennai, Kakinada, Tuticorin, Machilipatnam, Vishakapatnam, Paradip, Kolkata, Mongla, Chittagong and Yangon.
Many above rivers of India and Bangladesh breeze west to east into the Bay of Bengal: in the north, the Ganges River (or Ganga), Meghna River and Brahmaputra River rivers, and in the south Mahanadi River through the Mahanadi River Delta, Godavari River, Krishna River, Irrawaddy and Kaveri River (sometimes accounting as Cauvery) rivers. The beeline classified river which drains into the Bay of Bengal is Cooum River at 64 km. Brahmaputra is the 28th longest River in the World (2,948 km or 1,832 mi), and it discharges into the 'Bay of Bengal' and campaign through India, P.R. China, Nepal, Bangladesh and Bhutan. The Sundarbans mangrove backwoods is formed at the basin of the Ganga, Brahmaputra and Meghna rivers on the Bay of Bengal. The Ayeyarwady River of Myanmar additionally flows into the bay.