USGS Groundwater Information
Groundwater Resources Program
Freshwater-Saltwater Interactions along the Atlantic Coast
A Regional Assessment of the Ground-Water Resources Program
Bibliography on the Occurrence and Intrusion of Saltwater in Aquifers along the Atlantic Coast of the United States:(Open-File Report 02-235)
About the Regional Assessment
Freshwater aquifers along the Atlantic coast of the United States are bounded at their seaward margins by saltwater. Ground-water withdrawals from these aquifers can cause lateral and vertical intrusion of surrounding saltwater, and incidences of saltwater intrusion have been documented throughout the eastern seaboard (figure 1). Withdrawals also can change the patterns of ground-water flow and discharge to coastal ecosystems, which may alter the nutrient budgets and salinity of coastal waterways and wetlands. Projected future growth in population along the coastal areas of the United States will likely increase stresses on coastal aquifers and ecosystems in the next century. As part of the Ground-Water Resources Program, the USGS is conducting an assessment of freshwater-saltwater interactions and issues along the Atlantic coast, focusing on saltwater intrusion into freshwater aquifers and ground-water discharge into coastal ecosystems.