Model:TUGS

Contact

Name	Yantao Cui
Type of contact	Model developer
Institute / Organization	Stillwater Sciences
Postal address 1	2855 Telegraph Ave. Suite 400
Postal address 2
Town / City	Berkeley
Postal code	94705
State	California
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	yantao@stillwatersci.com
Phone	510-848-8098 x120
Fax	510-848-8398

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TUGS

Metadata

Summary Also known as Model type Single Model part of larger framework Note on status model Date note status model Technical specs Supported platforms Windows Other platform Can be compiled to other systems Programming language Fortran77, Fortran90 Other program language in Excel for input/output manipulation Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2006 Does model development still take place? No If above answer is no, provide end year model development 2008 Code development status When did you indicate the 'code development status'? Model availability As teaching tool Source code availability (Or provide future intension) Source web address Source csdms web address Program license type Other Program license type other Propritary code Memory requirements Depending on node,number of sizes and number of layers information has to be stored Typical run time Hours to hundredes of years, but typically annual output In/Output Describe input parameters describe input parameters: Initial longitudinal profile and estimated surface/subsurface grain size; sediment input, including both rate and grain size distribution, and typically at a long-term-avearged basis; and water discharge, typically daily average discharge. Input format ASCII Other input format A Excel-VBA workbook is available for input data processing and simple error checking Describe output parameters Time variation of longitudinal profile, sediment flux and grain size distributions of bedload, surface and subsurface sediment. Output format ASCII Other output format Output results must be processed with a Excel-VBA workbook Pre-processing software needed? No Describe pre-processing software Post-processing software needed? Yes Describe post-processing software A Excel-VBA workbook is available to extract the output files into various Excel worksheets. Visualization software needed? No If above answer is yes Other visualization software Process Describe processes represented by the model The two key elements of TUGS model are a surface-based bedload transport equation that allows for calculation of transport rate and grain size distribution of both gravel and sand (Wilcoco and Crowe 2003), and functions that link bedload grain size distributions with surface and subsurface grain size distributions (Hoey and Ferguson 1994; Toro-Escobar et al. 1996; Cui 2007a). Describe key physical parameters and equations See Cui (2007a) for detail: http://dx.doi.org/10.1029/2006WR005330 Describe length scale and resolution constraints Length varies, resolution is on the order of several channel width (i.e., 1D model produces only reach-averaged results). Describe time scale and resolution constraints For typical application in a natural river as a prediction tool, the recommended resolution is annual, although it can be as high as hours for simulation of a specific known event. Describe any numerical limitations and issues TUGS was developed with a fairly low budget, and thus, bugs may still exist. There are, however, no known numerical limitations at this point. Testing Describe available calibration data sets See two papers: Cui (2007a) http://dx.doi.org/10.1029/2006WR005330 Cui (2007b) http://dx.doi.org/10.1002/rra.1012 A manuscript with regard to its application to the Waipaoa River, NZ is currently underway by Basil Gomez and others. Upload calibration data sets if available: Describe available test data sets St. Anthony Falls Laboratory downstream fining experiments (Rebecca Soileau, Chris Paola and Gary Parker) Upload test data sets if available: Describe ideal data for testing -- Other Do you have current or future plans for collaborating with other researchers? Collaboration is always welcomed. The developer, however, does not have any funding to cover such activities. So it may take a fairly long time to finish a modeling exercise if it is done in his spare time. Is there a manual available? No Upload manual if available: Model website if any Model forum / discussion board Comments -- TUGS Introduction History Papers TUGS Questionnaire Contact Information Model: The Unified Gravel-Sand (TUGS) Model Contact person: Yantao Cui Institute: Stillwater Sciences City: Berkeley Country: USA Email: yantao@stillwatersci.com 2nd person involved: -- 3rd person involved: -- Model description Model type: Single model for the terrestrial domain. Description: TUGS is a 1D model that simulates the transport of gravel and sand in rivers. The model predicts the responses of a channel to changes made to the environment (e.g., sediment supply, hydrology, and certain artifical changes made to the river). Output of the model include longitudinal profile, sediment flux, and grain size distributions in bedload, channel surface and subsurface. Technical information Supported platforms: Windows, Can be compiled to other systems Programming language: Fortran77, Fortran90, in Excel for input/output manipulation Model was developed started from: 2006. Currently there is no further development To what degree will the model become available: The model may potentially be available as a teaching tool Current license type: Propritary software Memory requirements: Depending on node,number of sizes and number of layers information has to be stored Typical run time: Hours to hundredes of years, but typically annual output Input / Output description Input parameters: describe input parameters: Initial longitudinal profile and estimated surface/subsurface grain size; sediment input, including both rate and grain size distribution, and typically at a long-term-avearged basis; and water discharge, typically daily average discharge. Input format: ASCII, Other: A Excel-VBA workbook is available for input data processing and simple error checking Output parameters: Time variation of longitudinal profile, sediment flux and grain size distributions of bedload, surface and subsurface sediment. Output format: ASCII, Other: Output results must be processed with a Excel-VBA workbook Post-processing software (if needed): yes: A Excel-VBA workbook is available to extract the output files into various Excel worksheets. Visualization software (if needed): no Process description Processes represented by model: The two key elements of TUGS model are a surface-based bedload transport equation that allows for calculation of transport rate and grain size distribution of both gravel and sand (Wilcoco and Crowe 2003), and functions that link bedload grain size distributions with surface and subsurface grain size distributions (Hoey and Ferguson 1994; Toro-Escobar et al. 1996; Cui 2007a). Key physical parameters & equations: See Cui (2007a) for detail: http://dx.doi.org/10.1029/2006WR005330 Length scale & resolution constraints: Length varies, resolution is on the order of several channel width (i.e., 1D model produces only reach-averaged results). Time scale & resolution constraints: For typical application in a natural river as a prediction tool, the recommended resolution is annual, although it can be as high as hours for simulation of a specific known event. Numerical limitations and issues : TUGS was developed with a fairly low budget, and thus, bugs may still exist. There are, however, no known numerical limitations at this point. Testing Available calibration data sets: See two papers: Cui (2007a) http://dx.doi.org/10.1029/2006WR005330 Cui (2007b) http://dx.doi.org/10.1002/rra.1012 A manuscript with regard to its application to the Waipaoa River, NZ is currently underway by Basil Gomez and others. Available test data sets: St. Anthony Falls Laboratory downstream fining experiments (Rebecca Soileau, Chris Paola and Gary Parker) Ideal data for testing: -- User groups Currently or plans for collaborating with: Collaboration is always welcomed. The developer, however, does not have any funding to cover such activities. So it may take a fairly long time to finish a modeling exercise if it is done in his spare time. Documentation Key papers of the model: Cui (2007a) http://dx.doi.org/10.1029/2006WR005330 Cui (2007b) http://dx.doi.org/10.1002/rra.1012 Is there a manual available: No Model website if any: -- Additional comments Comments: -- Issues Help Input Files Output Files Download Source