Groundwater modeling

Groundwater model mesh (upper left) for Roi-Namur Island (on Kwajalein Atoll) and its initial state (lower left; saline ocean waters in red and the island's freshwater lens in blue). The subplots on the right show a modeled overwash event from the right side (red and greens), followed by the seawater settling down through the freshwater due to its greater density (middle), and then the freshwater lens fully recovering as the saltwater mixes out at the bottom of the lens (bottom).