Spatial scale analysis in geophysics - Integrating surface and borehole geophysics in groundwater studies
By: Frederick L. Paillet
Edited by: V.H. Singhroy, D.T. Hansen, R.R. Pierce, and A.I. Johnson
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Abstract
Integration of geophysical data obtained at various scales can bridge the gap between localized data from boreholes and site-wide data from regional survey profiles. Specific approaches to such analysis include: 1) comparing geophysical measurements in boreholes with the same measurement made from the surface; 2) regressing geophysical data obtained in boreholes with water-sample data from screened intervals; 3) using multiple, physically independent measurements in boreholes to develop multivariate response models for surface geophysical surveys; 4) defining subsurface cell geometry for most effective survey inversion methods; and 5) making geophysical measurements in boreholes to serve as independent verification of geophysical interpretations. Integrated analysis of surface electromagnetic surveys and borehole geophysical logs at a study site in south Florida indicates that salinity of water in the surficial aquifers is controlled by a simple wedge of seawater intrusion along the coast and by a complex pattern of upward brine seepage from deeper aquifers throughout the study area. This interpretation was verified by drilling three additional test boreholes in carefully selected locations.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Spatial scale analysis in geophysics - Integrating surface and borehole geophysics in groundwater studies |
| Issue | 1420 |
| Year Published | 2002 |
| Language | English |
| Larger Work Title | ASTM Special Technical Publication |
| First page | 77 |
| Last page | 91 |
| Conference Title | Symposium on Spatial Methods for the Solution of Environmental and Hydrologic Problems: Science, Policy and Standardization |
| Conference Location | Reno, NV |
| Conference Date | 25 January 2001 through 25 January 2001 |
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