期刊
WATER RESOURCES RESEARCH
卷 45, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2008WR007249
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资金
- National Science Foundation [9903103]
- Kansas Geological Survey Applied Geohydrology Summer Research Assistantship Program
- Directorate For Geosciences
- Division Of Earth Sciences [9903103] Funding Source: National Science Foundation
Various investigators have proposed hydraulic tomography, the simultaneous analysis of responses to multiple well tests, as a means to obtain a high-resolution characterization of aquifer flow properties. This study assesses the information content of drawdown records from a set of tomographic pumping tests in an alluvial aquifer, comparing the parameter sensitivity and resolution associated with transient and steady-shape formulations of the objective function for the parameter estimation problem. The steady-shape approach takes advantage of the rapid establishment of constant gradients within the region surrounding a pumping well, comparing observed drawdown differences within this region with drawdown differences predicted by a steady state model. Both the transient and steady-shape approaches resolve K variations only within a limited distance of the pumping intervals and observation points. Relative to the transient approach, the steady-shape approach reduces the influence of poorly resolved property variations, including K variations outside the region of investigation and storage coefficient variations throughout the model domain.
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