assistance in the selection, purchase of equipment

[pavel]

Help with the choice of "used" equipment for working with water in a soil layer up to 3-4 m.
What to look at from instruments measuring electrical resistivity?
approximate prices, availability and the possibility of buying used?

[geophix]

What's the purpose of measuring the resistivity? Just to get a sense about the scale and accuracy requirement of your measurement.

[pavel]

Soil cuts (1D) up to 3 - meters. Catena (2D) - 100-200 meters.

[99thpercentile]

I will second the questions by geophix above, without knowing the specific application we can't make any useful suggestions. Assuming that you are trying to map larger areas to depths of 3-4m, I would suggest that you will be looking at frequency domain electromagnetic induction (FDEM) instruments and not electrical resistivity. For shallow surveys (<6m depth), electrical resistivity is very slow compared to FDEM. The only exception is for grounding studies where in the USA the fall of potential approach is standard. A number of FDEM manufacturers are making most of their money now in providing instruments for precision farming.

[pavel]

Hello. The purpose is to study the water content in high detail, layer by layer (0-3 m,layer thickness 10-20 cm ), for the root-containing soil layer.

[doug581]

Thanks for your e-mail.
DC-2500 Seismoelectric Ground-flow Locator receives seismoelectric signal To locate water directly
Since 2011, Seismo Electronic has carried out ~300 commercial cases including locating water, geothermal and hydrocarbons around world—with 90% success rate in groundwater surveys. the direct survey depth is 800 M (2400ft), after down load data processing, the penetration will be 2000-3000M. Our interpreted seismoelectric data is 70% match the well log. There is also the relative permeability information of the aquifers.
We have videos of seismoelectric in Youtube:

https://www.youtube.com/channel/UCVW9Jj ... subscriber

We also offer online presentation with Zoom。

If you have any questions, please let me know.

Regard

Chi Dong

Seismo Electronics LLC.
Ground-flow locator
5855 Sovereign Dr.
Houston TX, 77036
http://groundwaterlocators.com http://seismoelectronics.com

832-798-9985