Transboundary river

A transboundary river is a river that crosses at least one political border, either a border within a state or an international boundary. Bangladesh has the highest number of these rivers, with at least 58 major rivers that enter the country from the Republic of India, including two of the world's largest rivers, the Brahmaputra and the Ganges. The Naf River is the only river that flows via Bangladesh into Myanmar.

The hydrologic and political effects of rivers that cross significant boundaries are enormous. Rivers have positive effects in that they carry a significant amount of sediment, which aids in building land in estuarine regions. However, this sediment raises the height of riverbeds, thereby causing flooding. International conventions governing water sharing have led to complex political disputes.^[1]

River	Length (km)	Countries
Amazon	7,800	Brazil Colombia Peru
Brahmaputra	3,848	Bangladesh China India
Colorado	2,333	Mexico United States
Columbia	2,000	Canada United States
Danube	2,860	Austria Bulgaria Croatia Germany Hungary Moldova Romania Serbia Slovakia Ukraine
Daugava	1,020	Belarus Latvia Russia
Dnieper	2,200	Belarus Russia Ukraine
Euphrates	2,800	Iraq Syria Turkey
Ganges	3,084	Bangladesh India
Ichamati	334	Bangladesh India
Indus	3,500	China India Pakistan
Irrawaddy	2,210	China Myanmar
Mekong	4,350	Cambodia China Laos Myanmar Thailand Vietnam
Meuse	925	Belgium France Netherlands
Niger	4,180	Benin Guinea Mali Niger Nigeria
Nile	7,088	Burundi DR Congo Egypt Eritrea Ethiopia Kenya Rwanda South Sudan Sudan Tanzania Uganda
Rhine	1,230	Austria France Germany Liechtenstein Netherlands  Switzerland
Rhône	813	France  Switzerland
Rio Grande	3,051	Mexico United States
St. Lawrence	500	Canada United States
Tagus	1,007	Portugal Spain
Tigris	1,850	Iraq Syria Turkey
Yukon	3,190	Canada United States
Zambezi	2,474	Angola Botswana Mozambique Namibia Zambia Zimbabwe

• List of Bangladesh-India transboundary rivers
• List of international river borders

• Global Transboundary Protected Areas Network
• Universities Partnership for Transboundary Waters
• Publication and Information Resources
• Bibliography on Water Resources and International Law. Peace Palace Library