The Challenge
A Marsh Under Pressure
Along the southeastern shoreline of Parris Island, the salt marsh is being stripped away by a combination of rising sea level, increasingly energetic waves and currents, periodic storms, and physical infrastructure that limits the marsh’s ability to migrate landward.
At Elliott’s Beach, erosion is not confined to a narrow marsh edge. Large portions of the intertidal marsh have already been lost, exposing the underlying foundation and leaving coarse shell and sand in places where functioning marsh once existed.
Small Pocket of remaining upper salt marsh, partially shielded by a large groin, is actively eroding
Active erosion of the whole intertidal section at Elliots Beach exposing marsh foundation.
The whole intertidal marsh has been eroded leaving a course shell and sand lag
Why Traditional Approaches Are Not Enough Here
Traditional living shorelines work best where enough marsh remains and erosional pressure is moderate enough for vegetation and reef-building organisms to establish and persist. Elliott’s Beach is different. The intensity and combination of wave, current, storm, and sea-level forces have pushed the system toward collapse.
Large conventional hard structures have not restored marsh function either. The project therefore treats Elliott’s Beach as a test of a hybrid strategy: first address the dominant erosional pressure, measure the response, and then determine where more traditional nature-based restoration can help recover marsh functions.
What is at Stake
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Buffering uplands and infrastructure from erosion
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Salt-marsh and intertidal habitat
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Nutrient and biogeochemical cycling
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Water and sediment filtering
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Long-term coastal resilience and adaptation