Acta Carsologica 2020 Dec;49(2-3):241-253
Karlsruhe Institute of Technology (KIT), Institute of Applied Geosciences, Division of Hydrogeology, D-76131 Karlsruhe, Germany.
We use the magnitude and centroid period of Rayleigh wave along with the amplitude of fluctuations of water level in a well to calculate effective porosity of a karst aquifer at the site scale. The radial and vertical displacements of Rayleigh wave are first related to the confining pressure of rock, which is then related to fluid pressure via the Gassmann equation. Three seismograms recorded at station 633A of the USARRAY and the induced responses of Well J-17 in the Edwards Aquifer (Texas) allow the calculation of an effective porosity between 17. Read More