The Ganges Flows into the Bay of Bengal—The Northeastern Arm of the Indian Ocean

The Ganges (Ganga)—India's holiest and most populous river—ends its 2,525 km journey by emptying into the Bay of Bengal.

The Bay of Bengal

• Part of: Indian Ocean (northeastern sector).
• Bounded by: India (west), Bangladesh (north), Myanmar (east), Andaman & Nicobar Islands (south).
• Area: 2.17M km² (largest bay in the world).
• Major rivers: Ganges, Brahmaputra (as Jamuna), Meghna, Mahanadi, Godavari, Krishna, Kaveri.

The Ganges–Brahmaputra–Meghna Delta

The combined discharge forms the world's largest delta (105,000 km²)—the Sundarbans—straddling India and Bangladesh. Key features:

• Sediment load: ~1 billion tonnes/year (Ganges + Brahmaputra).
• Mangrove forest: 10,000 km²; UNESCO World Heritage; Bengal tiger habitat.
• Population: >150M in the delta plain; extreme vulnerability to cyclones and sea-level rise.

Hydrologic Nuance

The Ganges' main distributary in Bangladesh is the Padma, which joins the Jamuna (Brahmaputra), then the Meghna before reaching the Bay. The "Ganges" name effectively ends at the India–Bangladesh border; downstream it's the Padma–Meghna system.

The Bay of Bengal's monsoon-driven circulation, low surface salinity, and high productivity make it a distinct large marine ecosystem—fueled by the Ganges and its Himalayan sisters.