You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.


    Spatial Scale Analysis in Geophysics — Integrating Surface and Borehole Geophysics in Groundwater Studies

    Published: 0

      Format Pages Price  
    PDF (416K) 15 $25   ADD TO CART
    Complete Source PDF (5.2M) 171 $105   ADD TO CART


    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.


    geophysics, borehole geophysics, electromagnetic surveys, seawater intrusion

    Author Information:

    Paillet, FL
    Project Chief, U.S. Geological Survey, Denver, CO

    Committee/Subcommittee: D18.01

    DOI: 10.1520/STP10915S