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- Hydrogeology 12
- Groundwater 9
- Watersheds 9
- Aquifers 8
- Hydrology 4
- Agriculture 3
- Precipitation (Meteorology) 3
- Water consumption 3
- Irrigation 2
- Sandstone 2
- Technology 2
- Water quality 2
- Arabah Valley (Israel and Jordan) 1
- Building 1
- Bureaucracy 1
- Contamination of environment 1
- Denitrification 1
- Desertification 1
- Drainage 1
- Electricity 1