Abstract
Abstract. We report preliminary results of physical experiments of rupture occurrence and propagation associated with land subsidence driven by groundwater pumping and compare our analogue model results with corresponding previously reported numerical results. In particular, we aim to test the development of tensile stresses above a bedrock ridge that forms the base of an aquifer system. The experiment reproduces the main deformation and ruptures observed in field cases and in the numerical analysis.
Highlights
The inception of ground fractures associated with land subsidence in exploited aquifer systems is an increasing induced hazard (Ye et al, 2019)
Three common geologic configurations encountered in aquifer systems prone to deform and fracture because of extensive groundwater pumping have been recently studied by using an advanced numerical model (Frigo et al, 2019)
The three cases correspond to (i) reactivation/displacement of a pre-existing fault, (ii) differential compaction due to variations in thickness of aquifer/aquitard layers constituting the aquifer system and (iii) the development of tensile stresses above a bedrock ridge that forms the base of the aquifer system
Summary
The inception of ground fractures associated with land subsidence in exploited aquifer systems is an increasing induced hazard (Ye et al, 2019). In this contribution we performed a physical experiment of fracture generation to compare with numerical results and evaluate the limits of physical model interpretation. Reproduction of the initial conditions of the natural prototypes, the choice of the materials, the deformation box and the technique to build the model can have an effect in the results.
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