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Topic
- Canals 13
- Politics and government 10
- Building 7
- Irrigation 7
- Water diversion 6
- Dams 5
- Water--Storage 5
- Finance 4
- Groundwater 4
- Hydrology 4
- United Nations 4
- Economics 3
- International regimes 3
- Refugees 3
- Resource allocation 3
- Armed Forces 2
- Armistices 2
- Floods 2
- Negotiation 2
- Water-power 2
