As knew from the ahead research, the field has mainly polluted by the harmful metal(Cr.).which range is about 28000 square meters, and 15 meters in depth.
The detection field was divided into AB area by the artificial metal fence and the reality road. As
estimated, the detection range is about 35200 square meter.and for the harmful metal soil field,it accorded as “the higher conductivity electrical reflection”. Specially, the test focus on soil difference between the high conductivity and original field conductivity.
There are 13 pcs testing line among all the higher conductivity test area. And with 1 pcs background testing line and 12pcs polluted testing line ERT-1~ERT-12
Name | Electrodes Amount | Spacing | Length of the testing line |
ERT-BG | 60 | 1 | 59 |
ERT-1 | 175 | 1 | 174 |
ERT-2 | 300 | 1 | 299 |
ERT-3 | 180 | 1 | 179 |
ERT-4 | 77 | 2 | 152 |
ERT-5 | 78 | 2 | 154 |
ERT-6 | 77 | 2 | 152 |
ERT-7 | 100 | 2 | 198 |
ERT-8 | 78 | 2 | 154 |
ERT-9 | 80 | 2 | 158 |
ERT-10 | 100 | 1 | 99 |
ERT-11 | 100 | 1 | 99 |
ERT-12 | 100 | 1 | 99 |
Background test line
Interpret data graph
2D testing data interpreted(1)
2D testing data interpreted(2)
3D Interpreted graph description
Interpreted graph marked in the reality field
The harmful metal contaminated soil has obviously display by low value of resistivity status. The high concentration of harmful metal soil has high electrical conductivity status. The survey results show that the overall pollution depth is about 14 meters.
The ERT resistivity method by GD 20 Multichannel system(Geomative) can highly efficiency where the testing among environment situation complex and depth and broad testing field. Which results also be proved by the ahead drilling construction samples researched reports.That is also reflect that the ERT method can be applied in localized the pollution field and offered the whole evaluation scope.
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