Model:MARSSIM

Contact

Name	Alan Howard
Type of contact	Model developer
Institute / Organization	University of Virginia
Postal address 1	P.O. Box 400123
Postal address 2
Town / City	Charlottesville
Postal code	22904-4123
State	Virginia
Country	USA"USA" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property.
Email address	ah6p@virginia.edu
Phone	434-924-0566
Fax	434-982-2137

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MARSSIM

Metadata

Summary Also known as Model type Modular Model part of larger framework Note on status model Date note status model Technical specs Supported platforms Linux, Windows Other platform Programming language Fortran90 Other program language Code optimized Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 1990 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Through CSDMS repository Source web address Source csdms web address Program license type Other Program license type other None Memory requirements Variable - dynamic arrays Typical run time hour to days In/Output Describe input parameters Initial elevation file. File specifying boundary conditions, run time, process options, and parameter values. Input format ASCII 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 Output format ASCII Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? Yes Describe post-processing software Photoshop to produce movies. Conversions to a variety of data formats. Visualization software needed? Yes If above answer is yes Other visualization software Surfer for topographic maps 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. Describe time scale and resolution constraints Variable - Limited by computer speed. 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 None Upload calibration data sets if available: Describe available test data sets Example runs for most types of simulation scenarios Upload test data sets if available: Describe ideal data for testing None Other Do you have current or future plans for collaborating with other researchers? Yes, at present primarily in the planetary community. Is there a manual available? Yes Upload manual if available: Media:marssim_program.pdf Model website if any http://erode.evsc.virginia.edu Model forum / discussion board Comments Most recent model available from ah6p@virginia.edu. Introduction History Papers 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 source code 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 Callisto Coastal Critical_shear_stress Deep_seepage Eolian Fluvial_no_cratering Fluvial_rapid_cratering Fluvial_slow_cratering Gully Large_crater Lava Moderate_cratering Non_linear_creep_enhanced Non_linear_creep_retarded Pediment Pelagic_sedimentation Resistant_bedrock Shallow_seepage Simple_steady_state slope_evap_steady_25 Small_crater Variable_evaporation