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	Simulation of fully coupled finite element analysis of nonlinear hydraulic properties in land subsidence due to groundwater pumping
	Yang Y.; Song, X. F.; Zheng, F. D.; Liu, L. C.; Qiao, X. J.
	2015
关键词	Fluid-solid interaction Land subsidence Groundwater pumping Nonlinear Numerical model saturated porous-media mathematical-model water-flow consolidation displacements deformation basin soils
英文摘要	A fully coupled mathematical model of land subsidence caused by groundwater pumping was established based on the mechanics of porous seepage and the theory of fluid-solid interaction. The mathematical model employing the Galerkin finite element method was proposed to simulate the deformation dependencies of hydraulic properties due to the water pressure decrease in aquifers. This model has been verified by comparing with the known analytical solutions in the confined aquifer. Results show that the simulated drawdown and displacements match well with those of analytical solutions. To evaluate the nonlinear effects of hydraulic properties in the seepage and consolidation coupling phenomena, the numerical model is applied to an ideal three layers numerical experiment. The results show that the subsidence rate is faster than conventional groundwater theory when the nonlinear hydraulic properties (NHP) are considered in the coupled model. The reason is that the water level decline due to groundwater withdrawal induces the soil compression and the porosity and permeability decrease. Decrease of permeability in regions adjacent to the pumping well produces hydraulic gradient and seepage forces that may result in accelerated subsidence. Therefore, the effect of the NHP is an interaction process of pore water pressure and soil consolidation deformation and should not be ignored. Further studies of various hydrogeology problems are recommended to consider the heterogeneity concerning different stratigraphic condition in the field.
出处	Environmental Earth Sciences
卷	73
期	8
页	4191-4199
收录类别	SCI
语种	英语
ISSN号	1866-6280
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/38987]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yang Y.,Song, X. F.,Zheng, F. D.,et al. Simulation of fully coupled finite element analysis of nonlinear hydraulic properties in land subsidence due to groundwater pumping. 2015.

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