The Coastal Plain aquifers are recharged primarily by precipitation in their outcrop areas. Groundwater flows from these areas of recharge, through the aquifers, and discharges to upper Costal Plain rivers, overlying aquifers as upward leakage, and wells. Ground-water flow in the Floridan aquifer system and the Tertiary sand aquifer prior to development is generally perpendicular to the coast.-from Authors
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Ground-water flow in the Coastal Plain aquifers of South Carolina.