Modelling The Tide Effects In Groundwater
Author(s)
J. Mls
Abstract
It is well known that in aquifers in contact with the ocean, sinusoidal fluctuations
of groundwater level occur in response to tides. Similar semidiurnal fluctuations
have been observed in the piezometric head of confined aquifers without any
contact with the ocean. These fluctuations are of interest to hydrogeologists and
geophysicists as they indicate that the observed wells are sensitive indicators of
the surrounding material deformations either by changes in the surface loading or
by applied strain.
The aim of the contribution is to model the pressure-head fluctuations in a
leaky confined aquifer as a result of periodic changes of the load originating in
the tidal changes of gravity acceleration. The Biot approach was used to derive
the governing equations. The aquifer characteristics and the imposed boundary
conditions were determined according to the known geology of the particular
site where the water level fluctuations were observed. The problem was solved
numerically and the obtained results were compared with the measured values.
Keywords: groundwater tides, water level fluctuations, tide potential, tide acceleration,
aquifer, solid phase compressibility, Biot’s approach.
Keywords
groundwater tides, water level fluctuations, tide potential, tide acceleration,
aquifer, solid phase compressibility, Biot’s approach
Related Book
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