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- Aquifers 2
- Groundwater 2
- Brackish waters 1
- Bureaucracy 1
- Finance 1
- Hydrogeology 1
- Hydrology 1
- Nasser, Lake (Egypt and Sudan) 1
- Reservoirs 1
- Salinity 1
- Sandstone 1
- Water consumption 1
- Water quality 1
- Water-supply 1
- Watersheds 1
