期刊
ENVIRONMENTAL MODELLING & SOFTWARE
卷 62, 期 -, 页码 253-270出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envsoft.2014.08.006
关键词
Groundwater; Surface water; Integrated hydrologic models; Water allocation; Conjunctive use
类别
资金
- U.S. Bureau of Reclamation San Joaquin River Restoration Program
- U.S. Geological Survey
- CSIRO
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. (C) 2014 Published by Elsevier Ltd.
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