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.
Suggested Citation
Paillet, F.L., 2002, Spatial scale analysis in geophysics - Integrating surface and borehole geophysics in groundwater studies, in ASTM Special Technical Publication, no. 1420, Reno, NV, 25 January 2001 through 25 January 2001, p. 77-91.
| 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 |