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Analysis and Visualization of Site Data
Analysis of site data requires: definition of the problem;
review the historical site investigations to minimize
duplication of effort of previous investigators; compilation
of the site data; and time for data processing and
interpretation. Data processing ranges from our favorite
look at it and think, to 3-D visualization and animation
and statistical assessment.
SEI relies heavily on visual presentation of data. If you are
buying our services, you should be able to understand what
we are doing. That generally requires a visual
presentation. Visualization is used qualitatively to
understand 3-dimensional systems and look for patterns in
data sets, and quantitatively to determine bounds on the
reliability of data and to evaluate trends and relationships
between data sets. SEI uses Microsoft Office, Amtek
TecPlot, and AutoCAD LT for most graphical
presentations.
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Groundwater Modeling
SEI performs groundwater flow and transport modeling using simple analytical and analytical
element models. About 90% of the groundwater flow issues can be evaluated using a
2-dimensional analytic element model. The analytic element model is a rapid modeling tool
with immediate, understandable graphical output. In a recent project, a groundwater
remediation design was optimized working with the client via a web-conferencing system. The
client identified areas of the site accessible for well installation, and areas where well
installation was not practical, and simulations were run in real-time. Several scenarios were
agreed upon for the client's upcoming public presentation.
Transport is simulated using analytical tools published by regulatory agencies. BioScreen and
BioChlor are simple models available from the EPA Center for Subsurface Modeling Support.
QuickDomenico is a model available from the PA DEP. Using simple models allows rapid
assessment of the critical transport parameters and leaves little question about the
assumptions in the model (as compared to complex 3-D numerical models that have
thousands of parameters to tweak, and question). Using models published by the regulatory
agencies ensures that the reliability of the model code will not be an issue.
Visualization is the best way to
understand your site, and to
explain the site to an oversight
agency or jury.
