Model:GPM

GPM

Model:	Geologic Process Modeler (GPM)
Contact person:	Daniel Tetzlaff
Institute:	Schlumberger
City:	Houston, TX
Country:	USA
Email:	dtetzlaff@slb.com
2nd person involved:	--
3rd person involved:	--

Model type:	Single model for the terrestrial, coastal and marine domain.
Description:	Another derivative of the original SEDSIM, completely rewritten from scratch. It uses finite differences (in addition to the original particle-cell method) to speed up steady flow calculations. It also incorporates compaction algorithms. A general description has been published.

Supported platforms:	Windows
Programming language:	C_plus
Model was developed started from:	2001 and was finished in 2006
To what degree will the model become available:	Not
Current license type:	--
Memory requirements:	2GB
Typical run time:	20 minutes

Input parameters:	Initial topography. Initial subsurface layering, if any. Properties of existing rocks/sediments. Sea-level change curve. Sources of flow and sediment, sources of wave action, boundary conditions Externally imposed vertical tectonics as a function of horizontal position and time
Input format:	ASCII
Output parameters:	Free-surface flow and wave action through time. Erosion and deposition through time. Optionally, compaction, including porosity reduction.
Output format:	ASCII
Post-processing software (if needed):	no (Post processing not needed, but important for visualization and data conversion).
Visualization software (if needed):	yes, Proprietary

Processes represented by model:	Free-surface flow including wave action Clastic erosion, transport, deposition Compaction (load-based, vertical porous flow, full 3D porous flow) Rudimentary carbonate growth
Key physical parameters & equations:	Shallow-water equations for fluid flow Separate equations for wave propagation Shield's criterion and transport capacity criterion for clastic transport (similar to SEDSIM) Sigle-phase flow in porous media for vertical and 3D compaction options.
Length scale & resolution constraints:	From a few hundred m to a few hundred Km
Time scale & resolution constraints:	From seconds to about 100,000 years.
Numerical limitations and issues :	Can be very slow in complex systems.

Available calibration data sets:	None available
Available test data sets:	None available
Ideal data for testing:	Laboratory and field data of free-surface flow and clastic transport rates.

Currently or plans for collaborating with:	I am interested in collaboration, but it may be difficult due to proprietary restrictions.

Key papers of the model:	Tetzlaff, D.M., and Schafmeister, M.-T., 2007, Interaction among sedimentation, compaction, and groundwater flow in coastal settings, /in /Harff, J., Hay, W.W. Tetzlaff, D.M., eds., Coastline Changes: Interrelation of Climate and Geological Processes: Geological Society of America Special Paper 426, p. 65–87.
Is there a manual available:	--
Model website if any:	--

Comments:	This model is unlikely to become available in any form other than snapshots of output. It is provided for reference.