Parameter Tree:
EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GROUND WATER > GROUND WATER PROCESSES/MEASUREMENTS > SALTWATER INTRUSION

Definition:
The intrusion of saline marine water into fresh groundwater supplies along coasts, often due to the extraction of fresh groundwater for human consumption.

Reference:
Goudie, Andrew. 1997. The Encyclopedic Dictionary of Physical Geography. Blackwell Publishing, Malden, Massachusetts.