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- Artificial groundwater recharge 5
- Groundwater 4
- Aquifers 3
- Watersheds 3
- Reservoirs 2
- Groundwater recharge 1
- Hydrogeology 1
- Irrigation 1
- Meḳorot (Tel Aviv, Israel) 1
- Precipitation (Meteorology) 1
- Salinity 1
- Sewage--Purification 1
- Technology 1
- Water quality 1