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Perrochet, Pierre
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Perrochet, Pierre
Affiliation principale
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Professeur ordinaire
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pierre.perrochet@unine.ch
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- PublicationAccès libreWatertable dynamics under capillary fringes : experiments and modelling(2000-02-20)
;Nielsen, PeterWatertable heights and total moisture content were measured in a sand column where the piezometric head at the base (“the driving head”) varied as a simple harmonic with periods in the range from 14.5 min to 6.5 h. The watertable height h(t) responded very closely to the driving head compared with the predictions of previous analytical and numerical models. The total moisture quantified as an equivalent, saturated height htot(t) varied very little compared with the watertable height. Neither h(t) nor htot(t) deviated significantly from simple harmonics when the driving head was simple harmonic. This indicates that non-linear effects are weak and hence that analysis based on linear solutions have fairly broad applicability. When h(t) and htot(t) are simple harmonic, the ratio nd=[dhtot/dt]/[dh/dt] is a constant in the complex formalism. Its magnitude