Horizons -> HUF

The following steps illustrate how to use the Horizons method to create HUF data

1. Create/Import Inputs

2. Assign Horizon IDs

3. Create 3D Grid/MODFLOW model

   A 3D Grid and MODFLOW model need to be first created to use the Horizon -> HUF command. The flow package for the MODFLOW model must also be set to use the HUF package.

   Click here to learn how to create a 3D Grid.

   Click here to learn how to create a MODFLOW model.

    

    

    

4. Setup additional optional inputs

5. Execute the Horizons command

   1. Select the Horizons->HUF command in the Borehole or TIN menu.

   2. Set up the options and inputs in the Horizons Wizard.

   3. Select Finish in the wizard to create the HUF data.

    

Horizon -> HUF Algorithm

When the Horizon command is executed the horizons specified on the borehole contacts or TIN nodes are converted to a set of scatter points with one data set for each horizon. The scatter points are then used to interpolate a surface for each horizon.  Starting with the lowest numbered horizon, the surface is extruded down to create a HUF layer  The surface corresponding to the next horizon is then extruded down to fill in the space between that surface and the previous surface.  This process is repeated for each surface.  At each step, HUF layer is created for the current horizon and all previously layers are subtracted from that layer, resulting in an incremental buildup of the stratigraphy from the bottom to the top. In conclusion the HUF Package elevation and thickness arrays are generated from the horizon data.

Example of Horizons to HUF