Modelling And Sensitivity Analysis Of Aquifer Parameters For Subsidence
Due To Pumping-injecting Water
Author(s)
J. Li
Abstract
In the present paper, aquifer modeling and analysis of parameter sensitivity have been conducted. First, a linear elastic solution has been introduced for modeling and sensitivity analysis of subsidence due to aquifer artificial discharge and recharge. The analytical modeling corresponds to boundary and initial conditions for discharge-recharge activity in a single and two aquifers respectively. The boundary condition comprises linear and periodic changes with time in strains that are induced by fluctuations of hydraulic head. The contined and saturated aquifer system is assumed to behave like linear poroelastic material. Second, sensitivity of aquifer parameters has been analyzed for cases of single and double wells installed within aquifers. Differences of parameter sensitivity related to pumping-injecting activity and aquifer property have been compared and analyzed in a unit column of an idealized compressible semi-pervious layer for one-dimensional land subsidence due to groundwater withdrawal and rejection. Results of sensitivity analysis of aquifer parameters, therefore, can be applied to guidance of pumping-injecting water from and into aquifers so that the potential risk of land subsidence due to artificial recharge and discharge can be reduced.
Keywords
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