TDR Equation Request

[Pedro Flombaum]

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Pedro Flombaum writes

Hi!

I mesured with a TDR 2 lenght profundities (10 and 25 cm) to establish 
the soil moisture volumetric constant. What I want to know if I can 
somehow substrat the short value to the long one, so I could have an 
idea of what is happenig at the lowest portion of the soil.

If I not wrong the TDR integrate the moisture over the wave guide, so 
the substrat must be relative to the length of the guide. I suppose 
that the equation should be something like:

         Lab*Oab - La*Oa
        ------------------  =  Ob
             Lb

Where La is the shortest lenght, Lab is the longest and Lb is the 
diference betwen them. Oa is the volumetric moisture constant from 
the shortest wave guide, Oab is the volumestric constant from the 
longest wave guide and Ob is the volumetric constant I am serching 
for.

Perhaps you could contact me with someone working in this subjet or 
recomend me a paper,

I would really apreciate your information,

Thanks in advance,

Lic. Pedro Flombaum