a. The Ganges-Padma.
b. The Brahmaputra-Jamuna.
c. The Surma-Meghna.
1. Fifty seven trans-boundary rivers: (includes the three major rivers and their tributaries and distributaries).
2. Seven independent riversdraining Chittagong and Chittagong Hill Tracts directly into the Bay of Bengal.
3. Inland water bodies 9wet lands) of haor, baors and beels.