Model:Cutbank

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Cutbank

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as A vector-based method for bank-material tracking in coupled models of meandering and landscape evolution 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 Landscape-Scale Model domain Terrestrial One-line model description A numerical model for a meandering river that interacts with heterogeneous bank materials Extended model description This software implements and builds on the kinematic model for meandering river evolution developed by Howard & Knutson (1984, https://doi.org/10.1029/WR020i011p01659). The original model described the time evolution of a channel centerline (i.e., the line midway between the banks of a channel with fixed width). Neither flow nor sediment transport is explicitly modeled, although sediment transport is implicitly modeled in cases (e.g., point bar deposition). This implementation adds a periodic boundary condition; enables tracking bank materials, using either a grid-based or a vector-based framework for modeling the co-evolution of channel migration and bank-material-properties; and includes functions for exporting movies and topographic data. Publications listed in the References section include or further information on implementation for specific geomorphic scenarios. Keywords: river, meandering rivers, Landscape Evolution, stratigraphy, Bedrock Erosion, Name Ajay Limaye Type of contact Institute / Organization University of Virginia Postal address 1 Postal address 2 Town / City Charlottesville Postal code 22904 State Virginia Country United States Email address ajay@virginia.edu Phone Fax Name Michael Lamb Type of contact Institute / Organization California Institute of Technology Postal address 1 Postal address 2 Town / City Pasadena Postal code 91125 State California Country United States Email address Phone Fax Supported platforms Windows Other platform With light modifications, operable with Linux/Mac OS Programming language C, Matlab Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2010 Does model development still take place? Yes If above answer is no, provide end year model development Code development status Active When did you indicate the 'code development status'? 2026 Model availability Source code availability (Or provide future intension) Through web repository Source web address https://github.com/alimaye/Cutbank/ Source csdms web address Program license type GPL v3 Program license type other Memory requirements Recommended: at least 4GB RAM Typical run time Minutes to days Describe input parameters Parameters for river geometry, channel migration model, bank-material properties, model domain, and file/input output. Specified with a wrapper script or using a graphical user interface. Input format Other input format Describe output parameters Timeseries data including channel positions, data for bank-material properties, and optionally movies and grids. Specified with a wrapper script or using a graphical user interface. Output format Binary Other output format MPEG-4 for movies 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 Matlab Other visualization software Describe processes represented by the model River meandering: The river channel is discretized using an ordered set of nodes that define the channel centerline and banks. At each time step, relative channel migration rates are calculated using a convolution of channel curvature weighted by distance upstream. Channel migration rates are adjusted based on the intrinsic properties of bank-materials and their spatial distribution in the model domain. Change in elevation of the channel bed (vertical incision and aggradation): The channel longitudinal profile can be initialized as flat or with a constant longitudinal slope. Overall changes in channel bed elevation are directly imposed as independent variables. The model accommodates rates of bed elevation change that vary in time (steady vs. unsteady) and in space (uniform vs. non-uniform). For the non-uniform, incising case, local vertical incision rates are calculated using a slope-dependent erosion rule. Bed elevation change is negative for incision and positive for aggradation. Bank-material tracking: The model can run with or without interaction between channel lateral erosion and bank-material properties. This interaction can be modeled using either vector-based bank-material tracking or using traditional, grid-based bank-material tracking. The grid-based approach is simpler for many applications, but model results can be highly sensitive to grid resolution in cases with large contrasts in erodibility of the bank materials (e.g., between sediment and bedrock). Visualization. Model results are visualized using post-processing scripts, which provide options to generate movies, movie frames as image files, and grids of geospatial data. For simulations of erosion, built-in functions map river terraces. Describe key physical parameters and equations The model for lateral channel migration by river meandering uses a spatial convolution of curvature with weighting coefficients for local vs. upstream curvature. Lateral migration rates can optionally respond to the local properties of bank materials; the form of this relationship varies for different geomorphic scenarios. Describe length scale and resolution constraints The model is designed to represent a river channel over an along-stream distance that corresponds to several meander wavelengths. Describe time scale and resolution constraints The time step for the model of river meandering is specified as an input parameter. The resolutions for model output files, including topographic grids and movies, are set as output parameters. Describe any numerical limitations and issues The vector-based approach to tracking bank materials amasses data for past channel positions over time, and then queries these data to reconstruct bank-material properties locally. Because this data structure grows with increasing simulation time, the model execution can slow down as the number of time steps exceeds ~10,000. Model runs with the vector-based approach to tracking bank materials and ~100,000 time steps may require a full day or more to complete. For a typical simulation, the grid-based approach for tracking bank materials is impractical for grid spacing less than 1 meter. The vector-based approach for tracking bank materials can achieve higher spatial resolution. Describe available calibration data sets Upload calibration data sets if available: Describe available test data sets Model execution can be tested using example scripts. These scripts and example output are described in the user manual included in the model repository. Upload test data sets if available: Describe ideal data for testing Do you have current or future plans for collaborating with other researchers? Yes, open to collaboration Is there a manual available? Yes Upload manual if available: Model website if any https://github.com/alimaye/Cutbank/ Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant Not yet"Not yet" is not in the list (Yes, No but planned, No but possible, No not possible) of allowed values for the "Code openmi compliant or not" property. BMI compliant Not yet"Not yet" is not in the list (Yes, No but planned, No but possible, No not possible) of allowed values for the "BMICompliant" property. WMT component Not yet"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of allowed values for the "Code CMT compliant or not" property. PyMT component Not yet"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of allowed values for the "Code PyMT compliant or not" property. Is this a data component No Can be coupled with:

Model info Authors Ajay Limaye Lamb Source code Go to external source code site Model citations Nr. of publications: 5 Total citations: 43 h-index: 3 m-quotient: 0.21 QR-code Link to this page Other models by author AR2-sinuosity Cutbank Sun fan-delta model

References

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Nr. of publications:	5
Total citations:	43
h-index:	3
m-quotient:	0.21

Featured reference(s)	Open Access Status	Year	Type of Reference	Cited
Limaye, Ajay B. S.; Lamb, Michael P.; 2014. Numerical simulations of bedrock valley evolution by meandering rivers with variable bank material. Journal of Geophysical Research: Earth Surface, 119927–950. 10.1002/2013JF002997	· publishedVersion	2014	module related theory	68
Limaye, Ajay B. S.; Lamb, Michael P.; 2013. A vector-based method for bank-material tracking in coupled models of meandering and landscape evolution: VECTOR-BASED BANK-MATERIAL TRACKING. Journal of Geophysical Research: Earth Surface, 1182421–2437. 10.1002/2013JF002854	· publishedVersion	2013	a module overview describing a module	16

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