Coastal Groundwater Flow
Storms have long-term impacts on the groundwater flows and subsurface salinity structure in coastal aquifers. Tides, waves and storm surge elevate the groundwater level within the beach. The resulting high groundwater propagates inland, and may cause flooding several days after a storm. Additionally, waves, tides, and storm surge force saltwater to infiltrate into the aquifer, and storm-driven pulses of high salinity may persist for months. Here, observations of groundwater heads and salinities collected continuously for three years are used to examine the effects of ocean storms, fluctuations in sound water levels, and morphological changes on a barrier island aquifer.