new group and first try

[Envisoft]

Hello to all members of the 3D Subsurface Visualization group!

In this group at the moment there are only new (!) members...

And for me it is also a totally new approach to communicate with
experts from other countries. I´m used to do it on a personal basis
via conferences and meetings and via e-mail as well.
But installing such a group has a little bit the private touch of a
club, were you can meet (if you want and when you want) to discuss
interesting things.
My personal philosophy always was to be open minded (I hope I am) and
exchange views in an open manner. So this group for me has two sides:
the first side to learn from other members what they learned in
environmental projects and which solutions they found to solve a
problem. On the other side I would like to contribute with my personal
experiences and views.
As one of the fields I´m strongly connected with is "innovative
investigation of contaminated sites", I would like to put a first
focus in this field.

And I would ask you for input on themes, discussions, etc. but also on
hints "how to run" this group.

Best regards

"Envisoft"

[Marku...@gmx.net]

Hello to all of the 3D Subsurface Visualisation Group!

I came here by the invitation of Envisofts' husband.
My name is Dr. Markus Perk, I'm a geophysicist. After studying
Geophysics at the Ruhr-University at Bochum (topics: seismology and
seismics) I became a researcher at the University of Cologne where I
participated at the EU waste site project NORISC. During this project
I got in touch with a developer of a geological 3D subsurface program
called GSi3D. Because NORISC needed such kind of program it was
integrated into the project but it had to be adapted to fit the needs,
i.e. data from the chemical and geophysical background had to be
included.
One goal of the project was to make decisions in the field thus
reducing time and costs and not to go the standard way of taking
samples, going to the lab and afterwards returning to the field
because you missed some samples.

To determine investigation points, geophysics was used to screen the
investigation area to get an overview over the whole subsurfaces
structure. While these results are normally shown in 2D (be it
vertically or horizontally), these first impressions can change when
seen in 3D together with chemical and geological data.
One crucial point for geophysics is that when you do i.e. seismical,
geoelectrical or electromagnetical measurements, you start your
interpretation with standard parameters. After having some results
from the geological drillings you need the re-interpret the data
because geophysical results depends often strongly on a starting model
which depends on the geolgoical background information. So we have an
interative way of calibrating geophysical data [I used the calibration
topic for my Ph.D. thesis, s.b.]. After having a sufficient knowledge
about the geology, geophysical anomalies (which should be free of
geological anomalies) can be source of chemical contaminations. The
fieldcrews discuss the results in the field with the help of the GIS
program and propose further chemical investigation points.

All of these data needs to be easily handled within one PC to be very
flexible with your decisions. NORISC was able to create such kind of
visualisation software.
Other projects need different requirements so the GSI3D software is
very specific in its use.

For further information about the geophysical background in the GSI3D
software look at:
http://www.geosum3d.de/cms/index.php?option=com_content&task=view&id=4&Itemid=98

Best Regards

Markus Perk