Groundwater response to tidal forcing

Melanie Emmajade Roberts


The groundwater response to tidal forcing in a phreatic aquifer is modelled using a perturbation approach for the case of a shallow beach. The principal features of the groundwater response, namely the super-elevation of the water table, attenuation of the forcing wave and the asymmetry and phase shift in the fluctuations, is investigated and compared with earlier solutions. These results demonstrate the importance of correctly including the beach slope effects to prevent the exaggeration of observed features for shallow beaches. A general solution method is presented, which provides an efficient method for obtaining higher order solutions.

  • B. Ataie-Ashtiani, R. E. Volker, and D. A. Lockington. Tidal effects on groundwater dynamics in unconfined aquifers. Hydrological Processes, 15:655--669, 2001. doi:10.1002/hyp.183
  • P. Nielsen. Tidal dynamics of the water table in beaches. Water Resour. Res., 26(9):2127--2134, September 1990.
  • J.R. Philip. Periodic nonlinear diffusion: An integral relation and its physical consequences. Aust. J. Phys., 26:513--519, 1973.
  • H. T. Teo, D. S. Jeng, B. R. Seymour, D. A. Barry, and L. Li. A new analytical solution for water table fluctuations in coastal aquifers with sloping beaches. Adv. Wat. Res., 26:1239--1247, December 2003. doi:10.1016/j.advwatres.2003.08.004

Full Text:



Remember, for most actions you have to record/upload into this online system
and then inform the editor/author via clicking on an email icon or Completion button.
ANZIAM Journal, ISSN 1446-8735, copyright Australian Mathematical Society.