Vertical Electrical Sounding (VES)
Interpretation Platform
A fully automated, non-statistical web tool for accurate resistivity analysis, eliminating curve matching, human bias, and iterative errors to deliver precise subsurface layer thickness and resistivity values.
Introduction
Vertical Electrical Sounding (VES) is the dominant geophysical resistivity method. It has been used worldwide for three primary purposes: geotechnical investigation, groundwater exploration, and mineral exploration. VES is performed using either the Wenner or Schlumberger electrode configuration. The Schlumberger method is most commonly used because it is less labour-intensive and also less time-consuming than the Wenner method. However, the field data generated by the Wenner method is more accurate. In fact, during the last century, electrical resistivity was being phased out of the geologic community because too many erroneous results had given it a bad name.
For the first time, a non-statistical method for interpreting VES data has been developed. The process is free of any curve-fitting, which involves personal judgement or least-squares fitting errors (either in Excel graph or Manual). There is no such conventional statistical or interactive iteration method or any usual geophysical inversion method has been applied. The method skips any human judgment or choice in modelling to determine the number of subsurface geoelectrical layers. The technique provides you with accurate thickness and resistivity values as the depth of investigation advances. This web-based tool is designed for fully automated interpretation of VES data obtained with any of the most popular arrays (Wenner or Schlumberger or half Wenner) used in the electrical prospecting. Its intelligent algorithms take its own decision, automatically determining the number of layers and their resistivity values unlike other interpretation software or inbuilt software, in which you will not get the thickness of the last layers and their correct resistivity. This web-based tool shall suggest the minimum thickness of the last layer and also exhibits the exact resistivity of the deep layers. If you use your archived data, you will be knowing how much of your precious information has been wasted.
Procedure
It is presumed that a user is an experienced interpreter willing to solve the geological problem and decipher the subsurface geological layers from the results of the geo-electrical layers. Special attention is paid to the user-friendly data entry. At first, enter the number of readings taken. As shown below, enter AB/2 and its corresponding Apparent Resistivity data boxes. Increase or decrease the above inputs whenever a high or low value message is suggested in the respective box. In this way, it would remove bad and outlying field data. This ensures clean data sets for logical, mathematical, and analytical data processing.
It is presumed that a user is an experienced interpreter willing to solve the geological problem and decipher the subsurface geological layers from the results of the geo-electrical layers. Special attention is paid to the user-friendly data entry. At first, enter the number of readings taken. As shown below, enter AB/2 and its corresponding Apparent Resistivity data boxes. Increase or decrease the above inputs whenever a high or low value message is suggested in the respective box. In this way, it would remove insufficient and outlying field data. This ensures clean data sets for logical, mathematical, and analytical data processing.