GMDSI

GMDSI has assembled an important collection of in-depth training material on decision support modelling in general, as well as on PEST, PEST++ and PyEMU. Visit the GMDSI web pages.

Videos

Visit the GMDSI YouTube channel for videos on practical and more philosophical subjects that include:

  • The maths behind PEST and PEST++;
  • Data space inversion;
  • Ensemble space inversion;
  • PLPROC;
  • Moveable structural overlay parameters;
  • Covariance matrices;
  • PEST file types;
  • Generation and adjustment of nonstationary parameter fields;
  • The journey of information;
  • Groundwater modelling and the scientific method;
  • Decision-support modelling with Python;
  • Recordings of GMDSI webinars.

There are 54 videos in all - hours of educational listening.

stochastic alluvial channels

Tutorials

GMDSI tutorials include files and documentation for many different aspects of PEST/PEST++ setup and usage. Topics include:

  • Use of MODFLOW 6, nonstationary geostatistics and data space inversion to model an open loop shallow geothermal system;
  • Three dimensional conceptual points, pilot points and nonstationary geostatistics;
  • Optimization under uncertainty using DSI;
  • 2D and 3D ensemble space inversion (ENSI);
  • Linear and nonlinear parameter and predictive uncertainty analysis;
  • Data worth analysis;
  • Use of OLPROC;
  • Structural overlay parameters;
  • Moveable alluvial channels as a parameterization device;
  • Construction of covariance matrices based on stationary and nonstationary variograms;
  • Basics of pilot points;
  • Model visualization and display using SURFER and PARAVIEW. 
mining pit

Worked Examples

A GMDSI worked example is comprised of a comprehensive document describing construction of a decision-support model, and use of that model in data assimilation and uncertainty analysis. As such, it describes how many features of PEST and PEST++ can be put to good use in innovative real-world modelling.

Worked example topics are as follows:

  • Structural overlay parameters and a tunnel model;
  • Contaminant source identification;
  • Coastal management modelling;
  • Probabilistic capture zone analysis;
  • Simultaneous interpretation of six pumping tests with structurally-controlled heterogeneity;
  • Using linear analysis to explore the predictive repercussions of model simplifications;
  • Township water supply security.
structural overlay parameters

Monographs

Occasionally GMDSI personnel publish a monograph on a topic that is considered important for decision-support modelling. Monograph topics include:

  • Decision support modelling self-questionnaire;
  • The journey of information and its repercussions for decision-support modelling;
  • Problem decomposition;
  • Decision-support modelling and the scientific method.
journey of information