Summary
| Also known as
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| Model type
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Modular
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| Model part of larger framework
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| Note on status model
|
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| Date note status model
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Technical specs
| Supported platforms
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Linux, Windows
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| Other platform
|
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| Programming language
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Fortran90
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| Other program language
|
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| Code optimized
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| Multiple processors implemented
|
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| Nr of distributed processors
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| Nr of shared processors
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| Start year development
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1990
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| Does model development still take place?
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Yes
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| If above answer is no, provide end year model development
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| Code development status
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| When did you indicate the 'code development status'?
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| Model availability
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As code
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Source code availability
(Or provide future intension)
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Through CSDMS repository
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| Source web address
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| Source csdms web address
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| Program license type
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Other
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| Program license type other
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None
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| Memory requirements
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Variable - dynamic arrays
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| Typical run time
|
hour to days
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In/Output
| Describe input parameters
|
Initial elevation file.
File specifying boundary conditions, run time, process options, and parameter values.
|
| Input format
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ASCII
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| Other input format
|
|
| Describe output parameters
|
RAW image files of elevation and shaded relief.
ASCII file of elevations at specified times.
ASCII files of other state variables as desired at specified times.
Iteration-by-iteration summary file
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| Output format
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ASCII
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| Other output format
|
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| Pre-processing software needed?
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No
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| Describe pre-processing software
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| Post-processing software needed?
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Yes
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| Describe post-processing software
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Photoshop to produce movies. Conversions to a variety of data formats.
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| Visualization software needed?
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Yes
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| If above answer is yes
|
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| Other visualization software
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Surfer for topographic maps
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Process
| Describe processes represented by the model
|
Bedrock fluvial incision (shear stress or sediment flux dependency).
Mass wasting (creep and threshold-limited).
Bedload sediment transport & deposition in streams, fans, deltas.
Impact cratering, aeolian deposition, lava flows.
Flow routing with evaporation from depressions.
|
| Describe key physical parameters and equations
|
Bedrock erodibility, mass wasting diffusivity, bed material grain size, flow hydrologic parameters, relative evaporation rate, cratering size distribution and rate, eolian deposition parameters, etc.
|
| Describe length scale and resolution constraints
|
Variable - targeted towards drainage basin or larger scales. Spatial scale determined by input parameter and run-time specification of array dimentions. Uses rectangular grid cells.
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| Describe time scale and resolution constraints
|
Variable - Limited by computer speed.
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| Describe any numerical limitations and issues
|
Runs with grid sizes greater than about 600x600 may require many days on a PC.
Model assumes fluvial streams have gradients determined by steady-state transport.
Depositional stratigraphy not modeled.
|
Testing
| Describe available calibration data sets
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None
|
| Upload calibration data sets if available:
|
|
| Describe available test data sets
|
Example runs for most types of simulation scenarios
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| Upload test data sets if available:
|
|
| Describe ideal data for testing
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None
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Other
| Do you have current or future plans for collaborating with other researchers?
|
Yes, at present primarily in the planetary community.
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| Comments
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Most recent model available from ah6p@virginia.edu.
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Introduction
History
Papers
Contact Information
| Model:
|
MARSSIM
|
| Contact person:
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Alan Howard
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| Institute:
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University of Virginia
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| City:
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Charlottesville, Virginia
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| Country:
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USA
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| Email:
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ah6p@virginia.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:
|
Modular for the terrestrial and coastal domain.
|
| Description:
|
A landform evolution model operating at the drainage basin or larger scale. Recent model development has targeted planetary applications.
|
Technical information
| Supported platforms:
|
Linux, windows
|
| Programming language:
|
Fortran90
|
| Model was developed started from:
|
1990 and development still takes place
|
| To what degree will the model become available:
|
Source code will be available. Model can also be used as teaching tool and executable will become available as well.
|
| Current license type:
|
None
|
| Memory requirements:
|
Variable - dynamic arrays
|
| Typical run time:
|
hours to days
|
Input / Output description
| Input parameters:
|
Initial elevation file.
File specifying boundary conditions, run time, process options, and parameter values.
|
| Input format:
|
ASCII
|
| Output parameters:
|
RAW image files of elevation and shaded relief.
ASCII file of elevations at specified times.
ASCII files of other state variables as desired at specified times.
Iteration-by-iteration summary file
|
| Output format:
|
ASCII
|
| Post-processing software (if needed):
|
yes, Photoshop to produce movies. Conversions to a variety of data formats.
|
| Visualization software (if needed):
|
yes, Surfer for topographic maps
|
Process description
| Processes represented by model:
|
Bedrock fluvial incision (shear stress or sediment flux dependency).
Mass wasting (creep and threshold-limited).
Bedload sediment transport & deposition in streams, fans, deltas.
Impact cratering, aeolian deposition, lava flows.
Flow routing with evaporation from depressions.
|
| Key physical parameters & equations:
|
Bedrock erodibility, mass wasting diffusivity, bed material grain size, flow hydrologic parameters, relative evaporation rate, cratering size distribution and rate, eolian deposition parameters, etc.
|
| Length scale & resolution constraints:
|
Variable - targeted towards drainage basin or larger scales. Spatial scale determined by input parameter and run-time specification of array dimentions. Uses rectangular grid cells.
|
| Time scale & resolution constraints:
|
Variable - Limited by computer speed.
|
| Numerical limitations and issues :
|
Runs with grid sizes greater than about 600x600 may require many days on a PC.
Model assumes fluvial streams have gradients determined by steady-state transport.
Depositional stratigraphy not modeled.
|
Testing
| Available calibration data sets:
|
None
|
| Available test data sets:
|
Example runs for most types of simulation scenarios
|
| Ideal data for testing:
|
None
|
User groups
| Currently or plans for collaborating with:
|
Yes, at present primarily in the planetary community.
|
Documentation
| Key papers of the model:
|
Howard, A.D., 1994, A detachment-limited model of drainage basin evolution, Water Resources Research, 30(7) 2261-85.
Howard, A.D., 2007, Simulating the development of martian highland landscapes..., Geomorphology, 91, 332-363.
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| Is there a manual available:
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See the marssim_program.pdf file for a brief tutorial
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| Model website if any:
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http://erode.evsc.virginia.edu
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Issues
Help
Documentation that describes MARSSIM subroutines and functions, input and output files, and literature references can be found here: marssim_program.pdf
Input Files
See: marssim_program.pdf
Output Files
See: marssim_program.pdf
Download
Template:Download Model
Accessory MARSSIM programs can be downloaded here:
accessory_programs.zip
Example simulations are for a variety of scenarios are generated and can be downloaded below:
- Accretion
- Arid_slope
- Bedrock: (download these 2 files and place Resist.in in the bedrock folder)
- Bedrock
- Resist.in
Source
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