Common approach for monitoring seawater intrusion include measuring groundwater level, hydrograph analysis, water quality sampling and geophysical logging.
These procedures provide discrete and tangible information for early-warning signs regarding saltwater intrusion adjacent to lands and groundwater aquifers.
This method can provide useful information concerning water quality over 100 miles (160 km) in a day by penetrating through sea surfaces to a depth of 1,500 feet (460 m).
Geologists, however, continue to study and survey Los Angeles County coastline because creating this hydraulic gradients is not fully efficient.
As a response, a coastal barrier project was later built by the Orange County Water District to combat saltwater intrusion which remains prominent and troublesome to this day.
Known as Water Factory 21, the District built in seven extraction wells located 2 miles away from the coast to intercept and send saltwater back into the sea.
This man-made hydraulic processes includes air stripping, recarbonation, multi-media filtration, carbon sequestration and chlorination.
[6] Both the levee system and delta islands help protect freshwater hydrology and municipal water treatment facilities from saltwater intrusion.
The health of the naturally formed barrier islands is critical for continued salt water exclusion, and is an active area of research.
[9][10] In the southernmost part of the Delta, the concentration of saltwater content increases as farmers irrigate their crops for fresh produce.
The California's Department of Water Resources built this tidal-flow control gate to limit high saline first introduced from Grizzly Bay and through the Montezuma Slough.