- journal_title：Geophysics
- Contributor：Zhao Gai-shan
- Publisher：Society of Exploration Geophysicists
- Date：1985-
- Format：text/html
- Language：en
- Identifier：10.1190/1.1442021
- journal_abbrev：Geophysics
- issn：0016-8033
- volume：50
- issue：9
- firstpage：1513
- section：Articles
With the development of computation techniques based on the digital linear filter method and the wide use of computers, automatic interpretation of vertical electric sounding (VES) data has become practical and common. The digital linear filter method developed in Ghosh (1971a, b) makes solving the inverse problem of VES easier and more practical, because it requires less computer time and storage space, is more accurate than other methods, and does not restrict the number of layers, electrode spacings, and layer depths. However, considerable ambiguity in the interpretation may result when many layers are involved. This means that strongly differing layer distributions may yield apparent resistivity sounding curves that, although not equal, differ so slightly that they cannot be accurately distinguished. In other words, the interpretation provided is only one of many acceptable interpretations, all of which are consistent with the field curves within the accuracy of measurements. Some combination parameters obtained may be useful in this case, and they are needed sometimes. I present a new method to interpret resistivity sounding data, by which some combination parameters such as total longitudinal conductance, total transverse resistance, and the resistivity of the substratum can be obtained.