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Topic
Groundwater
3
Irrigation
3
Runoff
3
Agriculture
1
Arid regions
1
Aswan High Dam (Egypt)
1
Cooperative societies
1
Droughts
1
Erosion
1
Evapotranspiration
1
Precipitation (Meteorology)
1
Water balance (Hydrology)
1
Water-power
1
Water-supply
1