Hydrogeological model with faults:


This is our second groundwater modeling webinar.

  1. See previous webinars at: https://blog.geomodelr.com
  2. Future webinars will arrive to you from support@geomodelr.com.


How to create a fault in Geomodelr?

Select the cross sections where the fault is located Fig_1.PNG

Create the fault Fig_2.PNG

Main buttons:

  1. Add a new fault.
  2. Extend a fault.
  3. Split a fault at a node.
  4. Remove a fault.
  5. Change the name of a fault.
  6. Change the properties of a fault.
  7. Save changes to the data base.

Create a total fault.

  • In the visualization page, click on the option Click to create visualization of your triangulated faults, write a name and click in Submit button. Fig_3.PNG


  • Geomodelr interpolates the fault through all cross sections where the fault was defined. Interpolation.PNG

Visualization of the faults

[[visual3d:Cross and Faults]]


Geomodelr to Modflow?


Export page

Export Button

Hydraulic parameters

  1. Kh: Horizontal hydraulic conductivity (Kx=Kh)
  2. Hani: Horizontal anisotropy (Hani = Ky/Kx )
  3. Kv: Vertical hydraulic conductivity (Kz=Kv)
  4. is it an active unit or not?

Hydraulic Parameters

Geometry features

  1. Algorithm: Choose one: Regular or Adaptive grid.
  2. Rows: Number of rows of Modflow grid.
  3. Colums: Number of colums of Modflow grid.
  4. Initial layers: Number of layers of Modflow grid (variable value in Adaptive grid).
  5. Minimum layer thickness: Minimum allowed layer thickness (only in Adaptive grid).
  6. Maximum angle: Maximum allowed angle between two consecutive points of the same a layer (only in Adaptive grid).

Geometry features

Simple vs Adaptive grid algorithms_tree.png

Faults grid


How to define the hydraulic properties for the fault?

Export page


Hydraulic properties of the faults

  1. Click on Click to set hydraulic properties at faults.
  2. Select Regular or Plane direction properties option.
  3. Define the hydraulic properties.

Regular vs Plane direction properties faults_method.png

Plane direction properties


Let's simulate!

[[visual3d:Units and Fault]]
  • 12 geological units.
  • Four faults.
  • 136 rows, 150 cols and 50 layers.




  • Ghilbert Borda because of the hydrogeological conceptual model.
  • Oscar Álvarez because of his help in the plane direction method.