GOLEM
Introduction
History
Papers
GOLEM Questionnaire
Contact Information
| Model:
|
GOLEM
|
| Contact person:
|
Greg Tucker
|
| Institute:
|
CIRES & Dept. Geological Sciences, Univ. of Colorado
|
| City:
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Boulder, CO
|
| Country:
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USA
|
| Email:
|
Gregory.Tucker@colorado.edu
|
| 2nd person involved:
|
--
|
| 3rd person involved:
|
--
|
Model description
| Model type:
|
Single model for the terrestrial domain.
|
| Description:
|
Landscape evolution model. Computes evolution of topography under the action of rainfall and tectonics.
|
Technical information
| Supported platforms:
|
UNIX, Linux, Mac OSX
|
| Programming language:
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C
|
| Model was developed started from:
|
1991 and development still takes place
|
| To what degree will the model become available:
|
As code
|
| Current license type:
|
GPL v.2
|
| Memory requirements:
|
variable
|
| Typical run time:
|
minutes to days
|
Input / Output description
| Input parameters:
|
Standard input parameter files (ascii). For some conditions, also require additional binary file specifying boundary configuration.
|
| Input format:
|
ASCII, Binary
|
| Output parameters:
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Elevation, drainage area, and related gridded information.
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| Output format:
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ASCII
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| Post-processing software (if needed):
|
no
|
| Visualization software (if needed):
|
yes, some visualization scripts for IDL and Matlab available.
|
Process description
| Processes represented by model:
|
Runoff, hillslope and channel sediment transport.
|
| Key physical parameters & equations:
|
Key state variables include surface elevation, soil thickness, and discharge.
|
| Length scale & resolution constraints:
|
Has been used on scales from small (few km2) watersheds to sub-continental areas.
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| Time scale & resolution constraints:
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Designed for time scales over which topography changes appreciably, which might be years for badlands, up to thousands or millions of years for other landscapes.
|
| Numerical limitations and issues :
|
Equation set is still and uses robust but relatively inefficient solvers. Recommend testing with coarse grid resolutions (say, 20x20 cells) before attempting larger/finer grids.
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Testing
| Available calibration data sets:
|
Few or none, unfortunately
|
| Available test data sets:
|
--
|
| Ideal data for testing:
|
See paper on geomorphic natural experiments by Tucker (in review, 2008)
|
User groups
| Currently or plans for collaborating with:
|
--
|
Documentation
| Key papers of the model:
|
- Tucker, G.E., and Whipple, K.X. (2002) Topographic outcomes predicted by stream erosion models: Sensitivity analysis and intermodel comparison, Journal of Geophysical Research, v. 107, no. B9, 2179, doi:10.1029/2001JB000162.
- Tucker, G.E., and Bras, R.L. (1998) Hillslope Processes, Drainage Density, and Landscape Morphology: Water Resources Research, vol. 34, p. 2751-2764.
- Tucker, G.E., and Slingerland, R.L. (1997) Drainage Basin Responses to Climate Change: Water Resources Research, vol. 33, p. 2031-2047.
- Tucker, G.E., and Slingerland, R.L. (1996) Predicting Sediment Flux from Fold and Thrust Belts: Basin Research, vol. 8, p. 329-349.
- Tucker, G.E., and Slingerland, R.L. (1994) Erosional Dynamics, Flexural Isostasy, and Long-Lived Escarpments. Journal of Geophysical Research, vol. 99, p. 12,229-12,243.
|
| Is there a manual available:
|
yes
|
| Model website if any:
|
http://www.colorado.edu/geolsci/gtucker/Software/Golem/GolemMain.html
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| Comments:
|
GOLEM was written in the 1990s by one of the creators of CHILD. Although it lacks many of the special capabilities of CHILD, it has a simpler, more compact code base (just a single C source file) and uses a raster grid data structure.
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Issues
Help
Input Files
Output Files
Download
You can download the source code at:
http://www.colorado.edu/geolsci/gtucker/Software/Golem/GolemMain.html
Source
