Ganges-Brahmaputra

Watershed statistics – Brahmaputra

• Country: China, India, Bangladesh
• Large-scale drainage area: SE Asia (Indian Ocean)
• Drainage: 651,334 km2
• Runoff: 587 km3/year
• Suspended sediment: 665 Mt/year
• Population density: 174 people/km2
• Large cities: 14
• Cropland: 14%
• Developed: 3%
• Modified land area: 32%
• Forest loss: 73%
• Large dams: 0

Watershed statistics – Ganges

• Country: China, India, Bangladesh, Nepal
• Large-scale drainage area: SE Asia (Indian Ocean)
• Drainage: 1,016,104 km2
• Runoff: 445 km3/year
• Suspended sediment: 500 Mt/year
• Population density: 375 people/km2
• Large cities: 82
• Cropland: 71%
• Developed: 8%
• Modified land area: 79%
• Forest loss: 85%
• Large dams: 6
• Sediment trapping efficiency: 0.01 (fraction)

Reference: Revenga, C., S. Murray, J. Abramovitz, and A. Hammond, 1998. Watersheds of the World: Ecological Value and Vulnerability. Washington, DC: World Resources Institute.