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  • What is Schlumberger array in 2D ERT survey?

    2021-04-15 15:50:04

    Schlumberger(2) This array is applicable for fixed cross section scan measurement; electrode arrangement and movement are as follows. Characteristics: The measured pseudo-section is an inverted trapezoid (above). Description: First, AM=MN=N...[more]

  • What is Dipole-dipole array in geo-electrical imaging method?

    2021-04-15 15:46:58

    Dipole-Dipole Roll Along (Dipole-dipole) This array is applicable for extendable cross section continuous roll-along scan measurement; electrode arrangement and movement are as follows. Characteristics: The measured pseudo-section is a para...[more]

  • What is Wenner array in geo-electrical tomography method?

    2021-04-15 15:38:58

    Wenner Alpha () This array is applicable for fixed cross section scan measurement; electrode arrangement and movement are as follows. Characteristics : the measured pseudo-section above is an inverted trapezoid. Description : First, electro...[more]

  • Transient EM(TEM) method and common configurations

    2017-08-16 19:26:51

    What is Transient EM(TEM)? The principle of Transient E.M.(TEM) method of geophysical prospecting is very simply, that current flowing in a a transmitter loop sets up a magnetic field which when switched off induces eddy currents to flow in...[more]

  • DC Resistivity & Electrical Resistivity Tomography

    2017-08-16 19:26:02

    DC Resistivity Electrical Resistivity Tomography (ERT) Geoelectric model from a dipole-dipole resistivity survey for water resource study: lower resistivities between 90 and 100 meters indicate increased water content due to higher fracture...[more]

  • Electrical probing depth of ERT method

    2017-08-16 19:22:56

    Electrical probing depth  Exploration depth depends on the maximum length measurement arrangement, rather than depending on the length of the survey line. Scroll measure does not increase the depth of exploration.  In the number of ele...[more]

  • Electrode distance and resolution

    2017-08-16 19:22:22

    Electrode distance and resolution  Electrode spacing should be 2 to 4 times the minimum diameter of the study  Resolution of about half the distance of the electrodes  The higher electrode distance is smaller, high density electrica...[more]

  • How to read data after 2D imaging survey of WDA system by Res2DInv?

    2017-08-16 19:20:22

    The step as following: Down load data files (*.wda) to your computer, either laptop or desktop; 2.Run WDAFC.exe (which will be provided in the CD delivered with instrument), Click open WDA data file to convert button and in the prompted dia...[more]

  • 1D VES, 2D imaging survey and 3D ERT survey

    2017-08-16 19:18:36

    The greatest limitation of the resistivity sounding method is that it does not take into account horizontal changes in the subsurface resistivity. A more accurate model of the subsurface is a two-dimensional (2-D) model where the resistivit...[more]

  • Magnetic Susceptibility

    2017-08-16 19:18:09

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