Question

What is an extraction barrier in saline water intrusion?

Answer 1

Saltwater intrusion is the movement of saline water into freshwater aquifers, which can lead to contamination of drinkingwater sources and other consequences. ... Water extraction drops the level of fresh groundwater, reducing its waterpressure and allowing saltwaterto flow further inland.
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Answer 2

Answer:

Extraction barrier can be created by pumping saline water continuously to the wells already exposed to seawater intrusion. By pumping the saline water, the interface can´t move toward the mainland. Therefore, the pumping will form a basin, in which the seawater and groundwater will flow into the basin.