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- Dams 66
- Politics and government 18
- Water-power 18
- Agriculture 16
- Irrigation 16
- Thawrah (Syria) 16
- Watersheds 12
- Soviet Union 10
- Groundwater 8
- Hydrology 8
- Technology 8
- Building 7
- Economic development 7
- Economics 6
- Canals 5
- Precipitation (Meteorology) 5
- Reservoirs 5
- Rivers 5
- Water consumption 5
- Al-Wehda Dam (Jordan) 4