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Nowadays several parts of the world suffer from land subsidence. This setting\udof the earth surface occurs due to different factors such as earth quakes,\udmining activities, and gas, oil and water withdrawal. This research presents\uda numerical study of the influence of land subsidence caused by a single\udwater extraction well and rapid water infiltration into structural soil\uddiscontinuities. The numerical simulation of the infiltration was based on a\udtwo-phase flow-model for porous media, and for the deformation a Mohr–Coulomb\udmodel was used.\ud  \udA two-layered system with a fault zone is presented. First a single water\udextraction well is simulated producing a cone-shaped (conical) water level\uddepletion, which can cause land subsidence. Land Subsidence can be further\udincreased if a hydrological barrier as a result of a discontinuity, exists.\udAfter water extraction a water column is applied on the top boundary for one\udhours in order to represent a strong storm which produces rapid water\udinfiltration through the discontinuity as well as soil deformation. Both\udevents are analysed and compared in order to characterize deformation of both\udelements and to get a better understanding of the land subsidence and new\udfracture formations

Land subsidence caused by a single water extraction well and rapid water infiltration