Sea water intrusion control

Ocean meets salt Water. Aerial view of Casa Cenote in Tulum, Quintana Roo, Mexico

Seawater intrusion associated with groundwater overdraft and lowering of groundwater levels has occurred in many of the coastal aquifers of the world. In general, under natural conditions, the seaward movement of freshwater prevents seawater from enroaching coastal aquifers. An interface between freshwater and seawater is maintained with denser seawater underlying freshwater. When groundwater is pumped from a coastal aquifer, lowered water levels can cause seawater intrusion to be drawn thoward the freshwater zones of the aquifer. The intruding seawater decreases the freshwater storage in aquifers.