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Dale Bridgford

Layer Elevations Using LIDAR and Horizons

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Hi,

Using 9.0.2, I have built the framework for a model which incorporates LIDAR for ground surface elevations (GSE) and horizons from borings for the underlying layers. When I push all of this to the 3D grid, the topography of the GSE seems to manifest itself in the lower layers. The ground surface is anthropogenic and should not have any bearing on the surface of the lower layers. Is the behavior I am seeing supposed to be happening or did I miss a setting when I pushed everything to the 3D Grid (Map to Modflow and Horizons to Solids->Solids to Modflow)?

Thanks,

Dale Bridgford

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Alan,

Thanks for the reply. It will be late today or tomorrow before I can generate the picture. In short, there is a lot of relief on the ground surface, which is man-made. Contacts between underlying layers are way more subtle, and do not look like the surface except for incised channels, but GMS imparts the surface topography to the contacts beneath. I used Horizons, LPF, and a ground surface elevation TIN.

Picture to follow later.

Thanks,

Dale

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