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Topic
- Riparian areas 9
- Dams 4
- Irrigation 4
- Politics and government 4
- Reservoirs 3
- Rivers 3
- Agriculture 2
- Lakes 2
- Technology 2
- Wadis 2
- Water quality 2
- Water-supply 2
- Aswan High Dam (Egypt) 1
- Bibliography 1
- Canals 1
- Climate 1
- Desertification 1
- Droughts 1
- Evaporation 1
- Groundwater 1
