Stratigraphic Modeling Issue

[Leah]

I am modeling stratigraphy for a site with 70 boreholes. Stratigraphy is highly variable spatially and with depth. I have used the stratigraphic picker tool to define the intervals present and not present (zero thickness) for all the boreholes onsite. The model is interpolating the units incorrectly and I am not sure how to fix this issue. Within the stratigraphic picker tool, the units look correct.

 

1. How do I get the model to mirror the observed stratigraphic units?

2. Is there a way to constrain the boreholes to the topo grid file?

3. Why is the model not interpolating stratigraphic units (i.e. C-06) below a certain depth?

 

Any help would be appreciated.

[Alison]

Leah,

 

It looks like you probably need to add some additional control for your lower units either at the bottom of or below C-06.  Because there is currently no data for these units listed for this borehole, the program is using shallower data from the surrounding boreholes to create shallower surfaces that are then truncating the upper units.  You can simply list the top and the base of the units using the TD for the borehole, or you could even list them with depths below the TD if you have a general idea of unit thicknesses in the area. 

 

Regarding your borehole elevations, you can update the elevation stored in the database to match an RwGrd file through the Edit | Adjust Elevations from Grid menu in the Borehole Manager tab.  Just keep in mind that this will overwrite the existing elevation values in the database, so you may want to back this data up if you need to preserver it.

 

I hope this helps, please let us know if you have additional questions.

 

Best Regards,

Alison