Dear Salah,

Here are some links that will be useful

https://en.wikipedia.org/wiki/Hydraulic_conductivity

http://web.ead.anl.gov/resrad/datacoll/conuct.htm

http://www.clemson.edu/ces/hydro/murdoch/murdoch%20papers/20060316140055683.pdf

https://info.ngwa.org/GWOL/pdf/022574621.pdf

http://www.waterlog.info/pdf/chap12.pdf

With my best regards

Prof. Bachir ACHOUR

If a pumped well test is used then permeability will be tested in several directions  including the vertical. The pump creates negative pressure at it's inlet and this draws water horizontally through the perforated pipe as well as up the bottom of the pipe. So the result is a combined horizontal and vertical value for permeability.

Hi,

It depends to what depth you measure hydraulic conductivity and at what depth lies ground water.