[Sgems-users] Use of SGeMS Sgsim with variogram only

[Vivian S. <viv...@uc...>]

I am using sgsim to create a virtual reality of hydraulic conductivity for
my thesis - using variogram as input (no hard data). I am confused about
what to expect on output - thought it would create a std normal
distribution of (which I could consider to be lnK). It did this for my
first variogram which I then back transformed using mean and stddev(of lnK)
and then converted to K.  Now I am trying to modify variogram to get more
structure - e.g. increasing range from 12 to 150-200.  The output does not
appear to be std normal. Is this approach valid?