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- Irrigation 7
- Water quality 7
- Dams 6
- Hydrology 6
- Economics 5
- Groundwater 5
- Rivers 5
- Technology 5
- Reservoirs 4
- Wadis 4
- Agriculture 3
- Aquifers 3
- Lakes 3
- Al-Wehda Dam (Jordan) 2
- Canals 2
- Industries 2
- Politics and government 2
- Riparian areas 2
- Saline water conversion 2
- Sewage 2