Einfluss des Grundwassers auf die Schadenswirkung von Erdbeben - Ein Überblick

This paper provides an overview of current understanding regarding the influence of local hydrogeologic conditions on seismic ground motion. The topic links both, hydrogeology and seismology given that variability in earthquake- induced damage is mainly determined by the local geological and hydrogeological conditions. These conditions, intern influence the amplitude, the frequency and duration of ground motion at a site. Groundwater level variations and associated saturation changes in sand layers within near-surface aquifers can influence local response spectra of the ground motion, through modification of shear-wave velocity. Changes of the groundwater level can also have a considerable influence upon the liquefaction potential of a region. Special attention is drawn to insitu pore-water pressure responses in aquifers during earthquakes, to observe and explain the triggering mechanism of liquefaction.