9.5.1. Survey Design and Forward Simulation

../../../_images/AtoZ_DC_fwrData.png

Here, we show how to create a simple dipole-dipole DC Resistivity survey over a conductivity model and run the forward simulation.

9.5.1.1. Setup for the Exercise

Tip

  • Requires at least GIFtools 2.26 (login required)

9.5.1.1.1. Create Overlapping surveys

In order to compare the resolving capabilities of different survey configurations, we will generate two sets of line data with the following specifications:

Use the DCIP Survey Designer

Block 1

Block 2

Survey Type

DC

DC

Transmitters/Receivers

pole-dipole

pole-dipole

IP Type

Apparent Chargeability

Apparent Chargeability

Dimension

3D

3D

Centroid

557250 E, 7134000 N

557400 E, 7133600 N

Bearing

\(45^\circ\)

\(90^\circ\)

Line Length (m)

1500

1500

Line Spacing (m)

300

100

Nb. lines

5

5

Electrode Spacing (m)

60

60

Nb. Receivers

20

20

Note

The survey do not contain elevation information. We will let the code set the vertical position based on the discretized topography.

9.5.1.1.2. Merge the surveys

../../../_images/AtoZ_DC_survey.png
  • Since we are creating two separate surveys, the lineID assigned to Block 1 and 2 will be repeated. We will add a constant to the line ID so that they are all unique identifiers.
  • Select Block 1 and combine block 2 to form one large survey.

    • Data Manipulation → Add Data → Merge other DCIP3D data

    • Rename the combine object DCSurveyFull

9.5.1.1.3. Forward model DC data

9.5.1.1.4. Forward model IP data