"Seventy percent of the dry season flow of the Ganges-Brahmaputra ... receives comes through the Brahmaputra, playing a crucial role in land formation in the delta region. Disruption to sediment ...

The Ganges begins as streams in the Himalayas and flows for 2,500km (1,600 miles), eventually combining with other major rivers, including the Brahmaputra and the Meghna. It's a huge delta river ...

These are Gangetic dolphins, a species of river dolphin - and India's national aquatic animal - that's found largely in the Ganges-Brahmaputra river system in the northern part of the country.