Model:PermafrostBankErosionModel

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PermafrostBankErosionModel

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Permafrost Bank Erosion Model Model type Tool Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 2D Spatial extent Reach-Scale Model domain Terrestrial, Hydrology One-line model description The PermafrostBankErosionModel is a model simulating thermal–mechanical riverbank erosion in permafrost environments. Extended model description The PermafrostBankErosionModel is a Python-based simulation module for modeling bank erosion in permafrost rivers, where thermal and mechanical processes interact seasonally. The model simulates river bank ablation and collapse under fluvial and thermal forcing. Keywords: Riverbank erosion, permafrost, ablation, collapse, Name Josie Arcuri Type of contact Model developer Institute / Organization University of Colorado, INSTAAR Postal address 1 Postal address 2 Town / City Boulder Postal code 80309 State Colorado Country United States Email address Josephine.Arcuri@colorado.edu Phone Fax Name Irina Overeem Type of contact Project manager Institute / Organization University of Colorado, INSTAAR Postal address 1 Postal address 2 Town / City Boulder Postal code 80309 State Colorado Country United States Email address overeem@colorado.edu Phone Fax Supported platforms Unix, Linux, Mac OS, Windows Other platform Programming language Python Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2022 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'? 2025 Model availability As code Source code availability (Or provide future intension) Through web repository Source web address https://github.com/josiearcuri/PermafrostBankErosionModel Source csdms web address Program license type GPL v3 Program license type other Memory requirements -- Typical run time 2 minutes Describe input parameters The model requires daily mean river water discharge, meteorological data, channel geometry, and thermal and mechanical characteristics of permafrost and river water. Input format ASCII Other input format Describe output parameters Bank profile and simulated erosion rates 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? No If above answer is yes Other visualization software Describe processes represented by the model This model simulates how flowing river water thaws interstitial pore ice in permafrost soils exposed on banks. This process - ablation - frees fine sediment that is otherwise cemented by ice, allowing for its entrainment and downstream transport. The model also simulates the episodic collapse of upper bank overhanging blocks that are undercut by ablation. This model is applicable to banks of permafrost rivers, but can be adapted to other settings. Describe key physical parameters and equations The model simulates ablation based on a fluvial heat transfer that is inhibited by latent heat in the bank. The fluvial heat transfer coefficient depends on flow shear velocity and thermal properties of river water, including temperature. Flow shear velocity is modeled as a function of river water depth and roughness of gravel on bank toes. The heat required to melt interstitial pore ice is based on thermal properties of bank material; these include permafrost volumetric ice content and surface temperature, ice melting temperature, heat capacity, density, and latent heat in ice. this is based on the work by Costard et al., (2003) and others. The model simulates collapse by removing overhanging bank blocks rom the bank profile when a torque-based threshold is exceeded. The model tracks bank morphology and checks is the threshold is reached at each timestep. For this component, parameters include permafrost tensile strength and density and the distance between troughs in the floodplain. This is based on the model by Barnhart et al. (2013). Describe length scale and resolution constraints The bank erosion model works best when the vertical spacing on the bank profile is on the order of centimeters for a 1-meter bank profile. Describe time scale and resolution constraints The water temperature model is limited to a 3-hour timestep when using daily mean discharge data and meteorological data with 15-minute resolution. If the bank erosion model is run with constant water temperature, then timesteps can be larger or smaller. To allow for realistic geometry of overhanging blocks, the model should be run with hourly to daily timesteps. Describe any numerical limitations and issues This model is limited to ice-rich permafrost exposures, where soil is at least 40% ice by volume and inorganic particles tend to be finer than sand. Describe available calibration data sets -- Upload calibration data sets if available: Describe available test data sets -- Upload test data sets if available: Describe ideal data for testing -- Do you have current or future plans for collaborating with other researchers? Is there a manual available? No Upload manual if available: Model website if any https://github.com/josiearcuri/PermafrostBankErosionModel/tree/main/docs/build/html Model forum / discussion board Comments 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 No but possible Is this a data component No Can be coupled with:

Model info Authors Josie Arcuri Overeem Source code Go to external source code site Model citations QR-code Link to this page Other models by author PermafrostBankErosionModel

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	PermafrostBankErosionModel	Model application	0
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