Describe the electrical resistivity method of site investigation.
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transmission module of GD-10 can be connected to external DC power supply up to 1200V (peak-to-peak 2400V) and output current up to 6A. GD-10 is highly compatible with independent external transmitter and implemented in extremely high-powered IP survey (>7200W). The unique IP profiling functionality is similar to ERT method, in which the cross-section profiling can be performed through multi-channel acquisition within single electrodes layout, thus enhancing the overall field survey efficiency.
In ERT survey, electrode placement impacts the overall survey efficiency. Field survey performance highly relies on the volume and weight of the cabling system, layout efficiency, module reliability and the robustness to adapt to environment and client demand. Geomative integrated the advantages of both conventional centralized cabling system and distributed cabling system, incorporating the low-cost and high reliability of the former with the high efficiency and infinitely extensible cable sections of the latter system. A distributed-centralized compacted cabling technique is hence developed, the Geomative. Each cable section is either 12 or 24 takeouts and is controlled through a centralized exchange control at the either end of the cabling heads, while the communication between the cabling heads and the measurement host adopted a distributed controlling approach. Not only long 2D cross-section profiling survey can be performed, 3D cross-section profiling is also feasible using this system which can be laid out simply, robust, and of high reliability.

GD-10 adopted modularized design and fully upgradable scheme, lowering the hardware maintenance and replacement cost. When clients intend to upgrade the purchased instrument, clients will only need to purchase corresponding license authorization and modules. Subsequent upgrades can be performed online through Geomative Studio directly and pre-purchased hardware resources are fully utilized. Furthermore, Geomative Studio software facilitates GD-10 geo-electrical measurement system to realize two major features:
Engineering management mode enables client to manage complicated task particulars and measurement data from field surveys.
Array configuration management function saves client the field operation time and enhance survey efficiency.
Main applications :
- Energy resources exploration - Seawater intrusion detection and dam inspection
- Metal and non-metal mining resources prospecting - Borehole/Cross-borehole investigation
- Groundwater resources exploration - Geological mapping
- Underground contamination variation detection - Cavity exploration
- Archeological studies - Well electrical resistivity testing
- Real-time monitoring of landslides - Crosshole ERT
- Sediment detection of river, lake and reservoir - Bedrock detection for pile foundation
- Urban engineering exploration - Marine and submarine survey

Product function
1D Resistivity or IP
In 1D VES survey, transmission up to full power 7200W (1200V*6A) can be emitted to allow excited pulse signals to reach deeper strata. For small signals, up to 255 stacking amounts are allowed to enhance measurement accuracy. Prior to field testing, measurement array configurations and the electrode scanning parameters can be inputted into the monitoring host, thus reducing the time spent in field to enter the survey parameters and increase survey productivity.
In ERT survey, electrode placement impacts the overall survey efficiency. Field survey performance highly relies on the volume and weight of the cabling system, layout efficiency, module reliability and the robustness to adapt to environment and client demand. Geomative integrated the advantages of both conventional centralized cabling system and distributed cabling system, incorporating the low-cost and high reliability of the former with the high efficiency and infinitely extensible cable sections of the latter system. A distributed-centralized compacted cabling technique is hence developed, the Geomative. Each cable section is either 12 or 24 takeouts and is controlled through a centralized exchange control at the either end of the cabling heads, while the communication between the cabling heads and the measurement host adopted a distributed controlling approach. Not only long 2D cross-section profiling survey can be performed, 3D cross-section profiling is also feasible using this system which can be laid out simply, robust, and of high reliability.

GD-10 adopted modularized design and fully upgradable scheme, lowering the hardware maintenance and replacement cost. When clients intend to upgrade the purchased instrument, clients will only need to purchase corresponding license authorization and modules. Subsequent upgrades can be performed online through Geomative Studio directly and pre-purchased hardware resources are fully utilized. Furthermore, Geomative Studio software facilitates GD-10 geo-electrical measurement system to realize two major features:
Engineering management mode enables client to manage complicated task particulars and measurement data from field surveys.
Array configuration management function saves client the field operation time and enhance survey efficiency.
Main applications :
- Energy resources exploration - Seawater intrusion detection and dam inspection
- Metal and non-metal mining resources prospecting - Borehole/Cross-borehole investigation
- Groundwater resources exploration - Geological mapping
- Underground contamination variation detection - Cavity exploration
- Archeological studies - Well electrical resistivity testing
- Real-time monitoring of landslides - Crosshole ERT
- Sediment detection of river, lake and reservoir - Bedrock detection for pile foundation
- Urban engineering exploration - Marine and submarine survey

Product function
1D Resistivity or IP
In 1D VES survey, transmission up to full power 7200W (1200V*6A) can be emitted to allow excited pulse signals to reach deeper strata. For small signals, up to 255 stacking amounts are allowed to enhance measurement accuracy. Prior to field testing, measurement array configurations and the electrode scanning parameters can be inputted into the monitoring host, thus reducing the time spent in field to enter the survey parameters and increase survey productivity.
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The basic principle behind electrical methods is the injection of current into the ground using a pair of electrodes. This current causes a potential difference in the ground which is measured by a separate pair of electrodes. The voltage measured can then, using the parameters of the survey, be converted into an apparent resistivity value. This value can provide a range of information regarding the material being tested. Different types of soil compositions have different resistivities. Variations of the method include electrical resistivity, self potential, and induced polarisation. Each of these methods can be used for a wide range of applications
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