Two-dimensional approximation for tidal dynamics in coastal aquifers: Capillarity correction

Most previous investigations on tide-induced watertable fluctuations in coastal aquifers have been based on one- dimensional models that describe the processes in the cross- shore direction alone, assuming negligible along-shore variability. A recent study proposed a two-dimensional approximation for tide-induced watertable fluctuations that took into account coastline variations. Here, we further develop this approximation in two ways, by extending the approximation to second order and by taking into account capillary effects. Our results demonstrate that both effects can markedly influence watertable fluctuations. In particular, with the first-order approximation, the local damping rate of the tidal signal could be subject to sizable errors.

Published in:
American Society of Civil Engineers Journal of Engineering Mechanics, 131, 5, 534-541

Note: The status of this file is: Involved Laboratories Only

 Record created 2005-12-09, last modified 2018-10-01

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