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Also known as
Model type Single
Model part of larger framework
Note on status model
Date note status model
Incorporated models or components:
Spatial dimensions 2D
Spatial extent
Model domain Terrestrial
One-line model description Landscape evolution model
Extended model description Landscape evolution model. Computes evolution of topography under the action of rainfall and tectonics.

landscape evolution,

Name Greg Tucker
Type of contact Model developer
Institute / Organization University of Colorado
Postal address 1 CIRES & Dept. Geological Sciences
Postal address 2 Campus Box 399
Town / City Boulder
Postal code 80309-0399
State Colorado
Country United States
Email address
Phone +1 303 492 6985
Fax +1 303 492 2606

Supported platforms
Unix, Linux, Mac OS
Other platform
Programming language


Other program language
Code optimized Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 1991
Does model development still take place? Yes
If above answer is no, provide end year model development
Code development status As is, no updates are provided
When did you indicate the 'code development status'? 2020
Model availability As code
Source code availability
(Or provide future intension)
Through CSDMS repository
Source web address
Source csdms web address
Program license type GPL v2
Program license type other
Memory requirements Variable
Typical run time minutes to days

Describe input parameters Standard input parameter files (ascii). For some conditions, also require additional binary file specifying boundary configuration.
Input format ASCII, Binary
Other input format
Describe output parameters Elevation, drainage area, and related gridded information.
Output format ASCII
Other output format
Pre-processing software needed? No
Describe pre-processing software
Post-processing software needed? No
Describe post-processing software
Visualization software needed? Yes
If above answer is yes IDL, Matlab
Other visualization software some visualization scripts for IDL and Matlab available.

Describe processes represented by the model Runoff, hillslope and channel sediment transport.
Describe key physical parameters and equations Key state variables include surface elevation, soil thickness, and discharge.
Describe length scale and resolution constraints Has been used on scales from small (few km2) watersheds to sub-continental areas.
Describe time scale and resolution constraints 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.
Describe any 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.

Describe available calibration data sets Few or none, unfortunately
Upload calibration data sets if available:
Describe available test data sets
Upload test data sets if available:
Describe ideal data for testing [[Describe ideal data::See: Tucker, G.E. (2009) Natural experiments in landscape evolution. Earth Surface Processes and Landforms, v. 34, p. 1450-1460, doi:10.1002/esp.1833.]]

Do you have current or future plans for collaborating with other researchers? --
Is there a manual available? Yes
Upload manual if available:
Model website if any
Model forum / discussion board
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.

This part will be filled out by CSDMS staff

OpenMI compliant No but possible
BMI compliant No but possible
WMT component No but possible
PyMT component
Is this a data component
DOI model 10.1594/IEDA/100132
For model version 5:14
Year version submitted 2011
Link to file
Can be coupled with:
Model info

Nr. of publications: 8
Total citations: 1858
h-index: 5
m-quotient: 0.17

Link to this page




Nr. of publications: 8
Total citations: 1858
h-index: 5
m-quotient: 0.17

Featured publication(s)YearModel describedType of ReferenceCitations
Tucker, Gregory E.; Slingerland, Rudy L.; 1994. Erosional dynamics, flexural isostasy, and long-lived escarpments: A numerical modeling study. Journal of Geophysical Research: Solid Earth, 99, 12229–12243. 10.1029/94JB00320
(View/edit entry)
1994 GOLEM
Model overview 457
See more publications of GOLEM



Input Files

Output Files