New Webinar: Unstructured grids for MODFLOW 6

We will learn the new features of MODFLOW 6, the current support of the software available, and use Geomodelr to generate a solid 3D model that then is exported to MODFLOW 6 with an unstructured voronoi grid.

You can now enjoy our Webinar: Unstructured grid for MODFLOW 6.

In addition, in the following link of GitHub you can find the python tutorial on how to load, edit, run and process the files exported from Geomodelr.

The “mf6_webinar” folder contains the model that was explained in the webinar, including results. There is also another folder called “mf6_model”. This folder contains the model that was exported from Geomodelr. On the other hand, both folders contain .zip files which contain the .vtk and the .disu file. These must be unziped into the respective folder. Finally, we share the link of the USGS where you can download the manuals, documentation and executable files of MODFLOW 6.


Geomodelr is proud to anounce support for MODFLOW 6. To launch it, we are going to have a new webinar! This webinar will be held Thursday July 25, at 15:00 UTC (11:00 E.T.), (subscribe to view your local time).

MODFLOW 6 is the lastest version of MODFLOW released by the USGS. There are several new capabilities in MODFLOW 6, like no-layered meshing structures or a full populed hydraulic-conductivity tensor. In this webinar, we are going explain how to export geological models from Geomodelr to MODFLOW 6, using prismatic meshes based on voronoi cells. This meshing scheme allows to track locally both rivers as wells geometry like MODFLOW-USG

Unlike MODFLOW-USG and previous versions of MODFLOW , MODFLOW 6 is able to created no-layered mesh. This means that each cell can be conected to any number of cells in horizantal and vertical way, allowing users to create meshes that follow more complex geolical models.

Geological model in Geomodelr and unstructured mesh of MODFLOW 6.

Users will able to set the value of hydraulic conductivities, active state, specific storage, etc., for each hydrogeoligcal unit. Furthermore, the users can use different geometric parameters to get the best numerical model that adjust to their own needs.


Rivers and wells discretization using unstructured grid based on voronoi cells.

Files output

Because MODFLOW 6 was released two years ago, there is no software that supports both numerical simulation as mesh visualization at the same time yet. For this reason, Geomodelr exports a set of files that are compatible with MODFLOW 6. These files can be loaded from python using flopy, a python library than runs MODFLOW-related groundwater programs. On the other hand, Geomodelr creates three more files:

  • vtk file: This file contains the mesh of the model, including hydraulic properties, wells and rivers. This kind of files can be loaded from PARAVIEW, a multi-platform data analysis and visualization application.
  • xml file: This file contains the color scheme of the geological units. These are the sames colors used in the model of Geomodelr. This file can be loaded from PARAVIEW too.
  • json file: This file contains a dictionary where keys are the name of the geological units and the values are the corresponding nodes in the mesh.
Comparison between the geological model and numerical mesh of MODFLOW 6.

In this webinar, Daniel Giraldo Cuartas, Mathematical engineer, Computational mechanics expert and MSc in Engineering, will be in charge of presenting how the MODFLOW 6 export module works. Daniel is also Geomodelr’s Tech leader. 

Block Diagram of the model generated in our first webinar. You can share interactive visualizations of a public study from Geomodelr in your website.

About Daniel Giraldo Cuartas

Daniel Giraldo Cuartas, Geomodelr's TECH leader

Mathematical Engineer, MSc in Engineering of Universidad EAFIT, Colombia. He has worked for 5 years in computational mechanics area, especially in the area of seismic wave propagation, where he authored papers related to nonlinear earthquake modelling. From 2 years ago, he has worked on computational hydrogeology and computational geometry in Geomodelr.

He has developed the export module for MODFLOW-2005, MODFLOW 6 and FEFLOW, allowing different users to create complex and numerical meshes in a easy way and compatible with these softwares.


About Ricardo Serrano:

Ricardo Serrano
Ricardo Serrano, Geomodelr's CEO and Founder

Ricardo is a developer and modeler with 10 years of experience in physical, geometrical and geological modeling. He has created computer models for everything from a ceramic tile to earthquakes covering tens of kilometers. He has authored and co-authored papers in computer simulations and computational geometry and topology. Ricardo started Geomodelr to give geologists a tool to put on a computer what they usually do on paper and to make their geology 3D without a huge effort. Geomodelr now has more than 1900 users around the world and is being used in more than 120 universities to teach structural geology and to model everything from earthquakes to mineral deposits. Right now, Geomodelr’s focus is Hydrogeology, and it allows geologists to create and to export 3D conceptual hydrogeological models to the main groundwater flow simulation platforms.

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