Author(s)

H. Sun & M. Koch

Abstract

The movement of water particles in a coastal aquifer is controlled not only by the regional flow, but also by the rising and falling of the tidal levels in the coastal water. This combined influence results in periodic variations of the hydraulic gradient with ensuing cyclic movements of water particles in a coastal aquifer. Based on a two-dimensional analytical series solution for the piezometric head in response to tidal loading, these cyclic movements are theoretically investigated. The approach is then applied to the New Jersey coastal aquifer near Atlantic City. Amplitudes and phases of 25 tidal constituents are calculated using standard harmonic analysis. After appropriate filtering of the observed piezometric heads,

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