iMOD User Manual version 4.4 (html)


9.24.1CPT GEF-file

A CPT GEF-file usually contains information about the penetration length, measure cone resistance, friction resistance, pore pressure, friction number, inclination, corrected depth, time, corrected cone resistance, net cone resistance, pore ratio, cone resistance number, weight per unit volume, in-situ initial pore pressure, total vertical soil pressure and effective vertical soil pressure.






GEF-CPT-Report, 1,1,0, -


CPT bv, Sondeerburg, 31


CT, 380730






W.A. van Buuren






1, m, penetration length, 1


2, MPa, Cone, 2


9, ground level, horizontal reference level


31000, -2.41








25.04 20.261

25.06 21.368

25.08 23.121

See for a more extensive description the TNO manual "GEF-CPT-Report.pdf".

9.24.2Borehole GEF-file

A Borehole GEF-file usually contains information about the layer depth, the numerical sand fraction ("zandmediaan" in Dutch) and the numerical gravel fraction ("grindmediaan" in Dutch). In addition information can be given on the clay percentage, silt percentage, sand percentage, gravel percentage, organic matter percentage, main soil type (sand, clay, etc.), color intensity, soil color and Carbon carbonate fraction.
Once the IPF-file has been created, this file can be loaded into iMOD and analyzed by making use of e.g. the cross-section visualization tool. Within iMOD you are able to choose the column you prefer to link to the *.DLF file legend in the 2D- and 3D-tool (see iMOD configuration in Section 6.8.1).

Note: Before loading the IPF-file into iMOD check the coordinate system (projection) of the data in the IPF-file. This might be different from the default coordinate system of iMOD; WSG84, EPSG:28992 Amersfoort RDnew. A reprojection of your GEF or IPF file might be preferred.

See for a more extensive description the TNO manual "GEF-BORE-Report.pdf".