Evaluation model coupling exploitable groundwater resources and land subsidence control in regional loose sediments

International Conference on Water Resource and Environment 2016

地球科学;生态环境科学

Luo, Z.J.^1 ; Zhao, S.J.^1 ; Jin, Wz^1 ; Ma, Q.S.^1 ; Wu, X.H.^2

School of Earth Science and Engineering, Hohai University, Nanjing, China^1

Institue for Computational and Mathematical Engineering, Stanford University, CA

94305, United States^2

关键词: Biot consolidation theory;    Geological disaster;    Groundwater overexploitation;    Groundwater seepage;    Nonlinear characteristics;    Terzaghi consolidation theory;    Three-dimensional groundwater;    Variation characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/39/1/012009/pdf
DOI  :  10.1088/1755-1315/39/1/012009

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The loose sediments in the Yangtze River Delta, the North China Plain, the plain of Northern Jiangsu and other districts in China are of great thickness, complex in structure and abundant in groundwater. Groundwater overexploitation easily results in geological disasters of land subsidence. Aiming at the issues, assessment models coupling exploitable groundwater resources and land subsidence control in regional loose sediments were brought up in this paper. The two models were: (1) a three dimensional groundwater seepage model with land subsidence based on the one dimensional Terzaghi consolidation theory; (2) a three dimensional full coupling model on groundwater seepage and land subsidence based on the Biot consolidation theory to simulate and calculate. It can be used to simulate and calculate the problems in real situations. Thus, the groundwater seepage and land subsidence were coupled together in the model to evaluate the amount of exploitable groundwater under the specific requirements of land subsidence control. The full coupling model, which considers the non-linear characteristics of soil mass and the dynamic changes of soil permeability with stress state based on the Biot consolidation theory, is more coincident with the variation characteristics of the hydraulic and mechanical properties of soil mass during the pumping process, making the evaluation results more scientific and reasonable.