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- Blue Nile River (Ethiopia and Sudan) 4
- Dams 2
- Irrigation 2
- Silt 2
- Bureaucracy 1
- Demography 1
- Economics 1
- Finance 1
- Gezira (Sudan : Region) 1
- Jonglei Canal (South Sudan) 1
- Politics and government 1
- Reclamation of land 1
- Resource allocation 1
- Roseires Dam (Sudan) 1
- Water quality 1
