Feedback of land subsidence on the movement and conjunctive use of water resources
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Abstract
The dependency of surface- or groundwater flows and aquifer hydraulic properties on dewatering-induced layer deformation is not available in the USGS's groundwater model MODFLOW. A new integrated hydrologic model, MODFLOW-OWHM, formulates this dependency by coupling mesh deformation with aquifer transmissivity and storage and by linking land subsidence/uplift with deformation-dependent flows that also depend on aquifer head and other flow terms. In a test example, flows most affected were stream seepage and evapotranspiration from groundwater (ETgw). Deformation feedback also had an indirect effect on conjunctive surface- and groundwater use components: Changed stream seepage and streamflows influenced surface-water deliveries and returnflows. Changed ETgw affected irrigation demand, which jointly with altered surface-water supplies resulted in changed supplemental groundwater requirements and pumping and changed return runoff. This modeling feature will improve the impact assessment of dewatering-induced land subsidence/uplift (following irrigation pumping or coal-seam gas extraction) on surface receptors, inter-basin transfers, and surface-infrastructure integrity.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Feedback of land subsidence on the movement and conjunctive use of water resources |
| Series title | Environmental Modelling and Software |
| DOI | 10.1016/j.envsoft.2014.08.006 |
| Volume | 62 |
| Year Published | 2014 |
| Publisher | Elsevier |
| Contributing office(s) | California Water Science Center |
| Description | 18 p. |
| First page | 253 |
| Last page | 270 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |