transform_direct: transform_direct
In khaors/rves: R package for the interpretation of Vertical Electric Soundings

Description Usage Arguments Details Value Author(s) References See Also

Function to transform the apparent resistivity into effective resistivities which are assumed closer to the real resistivities using an exponential equation.

1	transform_direct(ves, k = 2.3, alpha = 0.15)

`ves`	A ves object.
`k`	Empirical constant.
`alpha`	Decay exponent (pseudo-porosity factor).

The conversion from apparent resitivities to effective resistivities is achieved using the following expression:

ρ_{eff}=kρ_{app}\exp{(-(1-α))}

where:

ρ_{eff} is the effective resistivity which is assumed to be closer to the true resistivity.
ρ_{app} is the apparent resistivity measured in the field.
k is a empirical constant defined to improve the fit between the apparent and effective resistivities. This constant has a value of 2.3.
α is the exponent in the exponential relationship. Its value is of 0.15.

This function returns a list with the following entries:

depth: Depth
real.res: Real resisitivity

Oscar Garcia-Cabrejo khaors@gmail.com

Meju, M. Simple effective resistivity-depth transformations for infield or real-time data processing. Computers and Geosciences, 21(8), 985-992, 1995.

Other transformation functions: transform_scaling, transform_smoothed_zohdy, transform_zohdy

khaors/rves documentation built on May 29, 2019, 3:07 a.m.