1. 10th Inkaba yeAfrica Workshop Mabunda Vincent & Dr C.J.S. Fourie
Lord Milner Hotel, Matjiesfontein
29 August – 4 September 2014
Development of a D.C. Resistivity Modelling Laboratory for the Simulation of Wenner, Schlumberger and Dipole-dipole Configurations
Mabunda Vincent & Dr C.J.S. Fourie
Tshwane university of Technology
Faculty of Science
Department of Environmental Water and Earth Sciences

2. OUTLINE Introduction Objectives Constructing a tank and electronics
Transferring the geology
Laboratory testing
Results
Conclusion
Acknowledgements

3. Introduction
DC. Resistivity is an active geophysical method that measure electric potential associated with subsurface current flow generated by a DC source.
The purpose is to determine the subsurface resistivity distribution through measurements on the surface. Configurations that can be used:
Wenner, Schlumberger and Dipole-dipole e.t.c

4. OBJECTIVES Design and development of the scale modelling tank.
Testing of the modelling tank by simulating field geology.
Comparing modelled results with field results.

5. Constructing a tank and Electronics
CONSTRUCTING THE TANK

6. Constructing a tank and Electronics
CONSTRUCTING ELECTRONICS

7. Constructing a tank and Electronics
CONSTRUCTING ELECTRONICS

8. Transferring the geology
The first layer is made of crushed stones which form bed rock.
The second layer is top soil.

9. Transferring the geology
Third layer of normal layered tank
Third layer of a faulted tank

10. Laboratory testing
Voltage Scaling
Distance Scaling
Current Scaling

11. Laboratory testing

12. Results
NORMAL LAYERS
Wenner Configuration

13. Results FAULTED LAYER Wenner Configuration Dipole-Dipole Configuration
Position of the fault

14. Conclusions and Acknowledgement
This tank simulates geological responses accurately.
It enhances student understanding of D.C Resistivity.
Acknowledgement
Thanks to AEON, Inkaba yeAfrica and my supervisor Dr C.J.S Fourie

15. Thank you very much for your time
Questions
Thank you very much for your time