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Water Basin
- Danube River >> Romania 6
- Danube 6
- Euphrates River >> Basra Governorate >> Iraq 6
- Shatt al Arab 6
- Tigris River >> Basra Governorate >> Iraq 6
- Tigris-Euphrates/Shatt al Arab 6
- Unknown 6
- General 5
- Groundwater 4
- Dniester >> Ukraine 3
- Dniester 3
- Meuse >> Netherlands 3
- Rhine River >> Netherlands 3
- Rhine-Meuse 3
- Rio Grande (North America) 3
- Rio Grande >> Mexico >> North America 3
- An Nahr al Kabīr ash Shamālī 2
- Aral Sea 2
- Aral Sea 2
- Aras River 2
