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Changes of freshwater-lens thickness in basaltic island aquifers overlain by thick coastal sediments

Changes of freshwater-lens thickness in basaltic island aquifers overlain by thick coastal sediments

Abstract

Freshwater-lens thickness and long-term changes in freshwater volume in coastal aquifers are commonly assessed through repeated measurement of salinity profiles from monitor wells that penetrate into underlying salt water. In Hawaii, the thickest measured freshwater lens is currently 262 m in dike-free, volcanicrock aquifers that are overlain by thick coastal sediments. The midpoint depth (depth where salinity...

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