GOLEM
Introduction
History
Papers
GOLEM Questionnaire
Contact Information
Model:
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GOLEM
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Contact person:
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Greg Tucker
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Institute:
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CIRES & Dept. Geological Sciences, Univ. of Colorado
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City:
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Boulder, CO
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Country:
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USA
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Email:
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Gregory.Tucker@colorado.edu
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2nd person involved:
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--
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3rd person involved:
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--
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Model description
Model type:
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Single model for the terrestrial domain.
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Description:
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Landscape evolution model. Computes evolution of topography under the action of rainfall and tectonics.
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Technical information
Supported platforms:
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UNIX, Linux, Mac OSX
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Programming language:
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C
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Model was developed started from:
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1991 and development still takes place
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To what degree will the model become available:
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As code
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Current license type:
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GPL v.2
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Memory requirements:
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variable
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Typical run time:
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minutes to days
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Input / Output description
Input parameters:
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Standard input parameter files (ascii). For some conditions, also require additional binary file specifying boundary configuration.
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Input format:
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ASCII, Binary
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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):
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no
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Visualization software (if needed):
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yes, some visualization scripts for IDL and Matlab available.
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Process description
Processes represented by model:
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Runoff, hillslope and channel sediment transport.
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Key physical parameters & equations:
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Key state variables include surface elevation, soil thickness, and discharge.
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Length scale & resolution constraints:
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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.
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Numerical limitations and issues :
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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:
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Few or none, unfortunately
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Available test data sets:
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--
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Ideal data for testing:
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See paper on geomorphic natural experiments by Tucker (in review, 2008)
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User groups
Currently or plans for collaborating with:
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--
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Documentation
Key papers of the model:
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- 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.
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Is there a manual available:
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yes
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Model website if any:
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http://www.colorado.edu/geolsci/gtucker/Software/Golem/GolemMain.html
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Comments:
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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