Coupled Stress-Dependent Groundwater Flow-Deformation Model to Predict Land Subsidence in Basins with Highly Compressible Deposits
Open Access
- 29 August 2019
- Vol. 6 (3), 78
- https://doi.org/10.3390/hydrology6030078
Abstract
In this study, a stress-dependent groundwater model, MODFLOW-SD, has been developed and coupled with the nonlinear subsidence model, NDIS, to predict vertical deformation occurring in basins with highly compressible deposits. The MODFLOW-SD is a modified version of MODFLOW (the USGS Modular Three-Dimensional Groundwater Flow Model) with two new packages, NONK and NONS, to update hydraulic conductivity and skeletal specific storage due to change in effective stress. The NDIS package was developed based on Darcy–Gersevanov Law and bulk flux to model land subsidence. Results of sample simulations run for a conceptual model showed that hydraulic heads calculated by MODFLOW significantly overestimated for confining units and slightly underestimated for aquifer ones. Moreover, it showed that applied stress due to pumping changed initially homogeneous layers to be heterogeneous ones. Comparison of vertical deformations calculated by NDIS and MODFLOW-SUB showed that neglecting horizontal strain and stress-dependency of aquifer parameters can overestimate future subsidence. Furthermore, compared to the SUB (Subsidence and Aquifer-System Compaction) package, NDIS is more likely to provide a more accurate compaction model for a complex aquifer system with vertically variable compression ( ), recompression , and hydraulic conductivity change ( ) indices.
Keywords
Funding Information
- National Science Foundation (1832065)
This publication has 14 references indexed in Scilit:
- Research on Flexible Joint Stiffness Test and Trajectory Planning of Space ManipulatorAdvances in Mechanical Engineering, 2013
- Sinking cities in Indonesia: ALOS PALSAR detects rapid subsidence due to groundwater and gas extractionRemote Sensing of Environment, 2013
- Monitoring ground deformation in Beijing, China with persistent scatterer SAR interferometryJournal of Geodesy, 2011
- Revisão: Subsidência regional associada à extracção de água subterrâneaHydrogeology Journal, 2011
- The anatomy of a disaster, an overview of Hurricane Katrina and New OrleansOcean Engineering, 2010
- Inverse procedure for calibrating parameters that control land subsidence caused by subsurface fluid withdrawal: 1. MethodsWater Resources Research, 2008
- Hydraulic Forces That Play a Role in Generating Fissures at DepthEnvironmental & Engineering Geoscience, 1994
- Horizontal aquifer movement in a Theis‐Thiem confined systemWater Resources Research, 1994
- The Empirical Evaluation of the Coefficient K0 and K0Soils and Foundations, 1967
- The Theory of Ground-Water MotionThe Journal of Geology, 1940