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Water Basin
- Danube River >> Romania 8
- Danube 8
- Columbia River >> Clatsop County >> Oregon >> United States 4
- Columbia 4
- Mekong River 4
- Mekong 4
- Rio Grande (North America) 4
- Rio Grande >> Mexico >> North America 4
- Amur River 3
- Amur 3
- Aral Sea 3
- Aral Sea 3
- Colorado River 3
- Colorado 3
- Har Us Nur 3
- Har Us Nuur 3
- Meuse >> Netherlands 3
- Nelson River >> Manitoba >> Canada 3
- Nelson-Saskatchewan 3
- Ob 3