Pollution Monitoring with Geophysics

​The location and temporal extension of soil pollution are of paramount importance for land-use planning, agriculture, water resources, and soil de-pollution. According to the type of pollution, electrical resistivity or induced polarisation can be linked to the presence of pollutants.

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The Syscal and Syscal Switch range will allow to locate, determine the spatial extension and monitor such pollutions. For large areas, the pollution extension can be determined more easily and rapidly using the Promis 10 slingram type EM profiler to realize resistivity maps.
Waste disposal objects need to remain under supervision during their whole lifetime. The first aspect of this supervision consists of checking the proper containment of wastes to avoid leachate leaks through the geomembrane and through the possible clayey layers. The second aspect deals with the monitoring of the homogeneous re-circulation of leachate in the waste disposal to ensure optimal biodegradation of waste.

The Syscal Switch range will allow to locate, determine the spatial extension and monitor the proper functioning of a waste disposal site.
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In the following example taken from Guérin et al. (2004), the leachate of a bioreactor is pumped and re-injected through a borehole. Monitoring of the electrical resistivity allows imaging the recirculation of the leachate (expansion, velocity, diffusion). This type of measurement can be realized with a Syscal Pro Switch in monitoring mode to optimize the number and location of boreholes used for the reinjection of the leachate.