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Hydrology
5
Technology
5
Water-supply
3
Irrigation
2
Rivers
2
Water quality
2
Aquifers
1
Aswan High Dam (Egypt)
1
Contamination of environment
1
Groundwater
1
Gush Dan (Israel)
1
Meḳorot (Tel Aviv, Israel)
1
Petroleum
1
Saline water conversion
1
Sewage
1
