Wenner, pole-pole, dipole-dipole, pole-dipole, Wenner-Schlumberger andĮquatorial dipole-dipole (rectangular) arrays. This program can be used for surveys using the The program supports both the finite-difference and finite-elementįorward modelling techniques. Inversion routine (deGroot-Hedlin and Constable 1990, Loke and Barkerġ996a). Values, and a non-linear least-squares optimisation technique is used for the
However, the program can also handle data sets with a non-uniform electrodeĪ forward modelling subroutine is used to calculate the apparent resistivity The survey is usually carried out with a system where the electrodesĪre arranged along a line with a constant spacing between adjacent electrodes. Of investigation (Edwards 1977) of the data points with the largest electrode The depth of theīottom row of blocks is set to be approximately equal to the equivalent depth Using the distribution of the data points as a rough guide. Theĭistribution and size of the blocks is automatically generated by the program Loosely tied to the distribution of the data points in the pseudosection. Rectangular blocks, is shown in Figure 2. The 2-D model used by the inversion program, which consists of a number of This program isĭesigned to invert large data sets (with about 200 to 21000 data points)Ĭollected with a system with a large number of electrodes (about 25 to 16000
Sequence that can be used for a 2-D electrical imaging survey. To 1600 by 1200 pixels and 16 million colours.įigure 1 shows an example of the electrodes arrangement and measurement It has been tested with video screen modes of up
Windows based program, all Windows compatible graphics cards and printersĪre automatically supported. RES2DINV is a computer program that will automatically determine a two-ĭimensional (2-D) resistivity model for the subsurface for the data obtainedįrom electrical imaging surveys (Griffiths and Barker 1993). No part of this document may be reproduced without written RES2DINV is copyrighted by Geotomo Software, 2000-2010.
On land, water and cross-borehole surveys
The COMSYS Pro software is a program allowing to control a SYSCAL Pro-Switch resistivity-meter in multi-electrode mode, from a PC.Wenner (,), dipole-dipole, inline pole-pole, pole-dipole, equatorial dipole-dipole, offset pole-dipole, The ELECTRE Pro software allows also to import any type of sequences, manually created in ″txt″ file, in case of specific applications Measurements (gapfiller quadripoles) that can be rejected after acquisition (by the PROSYS II IRIS Instruments software)). Optimization of sequences for higher acquisition speed (the optimization process can add some.Definition of the levels of investigation with the possibility of multi-spacing configuration for data quality improvement.Use of any type of standard electrode arrays (dipole-dipole, reciprocal Schlumberger-Wenner, poledipole forward & reverse, cross diagonal pole-pole …).The ELECTRE Pro software allows to create automatically (accounting an estimated maximum investigation depth, user specified) or manually, some sequences of measurements with many possibilities: The ELECTRE Pro software is a program allowing to create some 2D-3D-surface/boreholes sequences of measurement for IRIS Instruments SYSCAL Pro-Switch resistivity-meters.