Model:1D Particle-Based Hillslope Evolution Model

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1D Particle-Based Hillslope Evolution Model

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Single Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 1D Spatial extent Landscape-Scale, Watershed-Scale, Reach-Scale Model domain Terrestrial, Coastal, Geodynamic One-line model description 1D probabilistic, particle-based model of hillslope evolution for studying hillslope equilibration and response to perturbations. Extended model description This module implements a particle-based model of hillslope evolution, which has an associated continuum description (introduced here: https://arxiv.org/abs/1801.02810). The model takes as input a few simple parameters which determine the equilibrium hillslope shape and dynamics, and can be used to produce equilibrium profiles and study the response of the hillslope to perturbations. The model benefits from straightforward implementation, as well as the flexibility to incorporate sophisticated perturbations and to be accessorized by local or nonlocal fluxes. Keywords: Hillslope Model, Particle-based, Landscape Evolution, Name Jacob Calvert Type of contact Model developer Institute / Organization University of California, Berkeley Postal address 1 Department of Statistics Postal address 2 451 Evans Hall Town / City Berkeley Postal code 94709 State California Country United States Email address jacob_calvert@berkeley.edu Phone Fax Supported platforms Unix, Linux, Mac OS, Windows Other platform Programming language Matlab Other program language Code optimized Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2016 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 https://github.com/csdms-contrib/1D-Particle-Based-Hillslope-Evolution-Model Program license type GPL v2 Program license type other Memory requirements Typical run time Describe input parameters The model takes as input (i) p, dynamics asymmetry parameter; (ii) L, the hillslope length; (iii) H, the hillslope height; (iv) N, the number of steps of the simulation; and (v) a choice of initial hillslope profile. Input format Other input format Describe output parameters The model can be customized to produce many different kinds of output but, typically, the output consists of (i) h, a final hillslope profile; (ii) h_diffs, a vector which summarizes how the profile changed over the duration of the simulation; and (iii) a vector expressing the fluxes of particles through a site along the hillslope. However, the same code can be used to produce a video of the hillslope evolution, a vector containing the absolute difference between the hillslope profile and a reference profile, and many other observables of interest. Output format 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 Overall, the module simulates a particle-based model of hillslope evolution in 1D. The module contains several scripts and functions, the most important of which are the following. (1) zrp.m is the script wherein the parameters are set and from which the following functions are called. (2) init_x.m is the function which generates an initial profile for the hillslope. (3) make_moves.m is the function which samples the probabilistic dynamics. (4) calc_rates.m is the function which determines the rates at which the particles are moving. In addition to these, there are the following. (5) perturb.m is the function which implements the hillslope perturbation and is called by the main script. (6) calc_flux.m and calc_fluxes.m are the functions which infer fluxes along the hillslope. Describe key physical parameters and equations The key physical parameters are the hillslope length and height, as well as a parameter which specifies the underlying asymmetry in the particle dynamics. The process of determining these parameters is described in the simulation section of a corresponding paper (which can be accessed here: https://arxiv.org/abs/1801.02810). Describe length scale and resolution constraints Although the hillslope length and height are specified, these are dimensionless numbers from the perspective of the module. Accordingly, the resolutions supported by the module are primarily constrained by the language in which it is implemented. However, the process of "dimensionalizing" the module's outputs may place practical constraints on resolution. The associated paper discusses this issue. Describe time scale and resolution constraints The time scale over which the simulation occurs is specified in zrp.m as an input parameter. Since the module is computationally lightweight, millions of time steps can be simulated quickly. Translating between discrete steps of the particle model and continuous, real-world time may be inferred during the dimensionalization process. Describe any numerical limitations and issues 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 Model forum / discussion board Comments Questions which arise about the module, the model it implements, and the associated theory, may be addressed by the preprint available at https://arxiv.org/abs/1801.02810. 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 Is this a data component DOI model 10.5281/zenodo.1436771 For model version v1.0 Year version submitted 2018 Link to file https://zenodo.org/account/settings/github/repository/csdms-contrib/1D-Particle-Based-Hillslope-Evolution-Model# Can be coupled with:

Model info Authors Jacob Calvert Source code View in CSDMS GitHub repository DOI Download 1D Particle-Based Hillslope Evolution Model version: v1.0 Doi: 10.5281/zenodo.1436771 Model citations Nr. of publications: 1 Total citations: 1 h-index: 1 m-quotient: 0.14 QR-code Link to this page Other models by author 1D Particle-Based Hillslope Evolution Model

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Nr. of publications:	1
Total citations:	1
h-index:	1
m-quotient:	0.14

Featured publication(s)	Year	Model described	Type of Reference	Citations
Calvert, J.; Balázs, M.; Michaelides, K.; 2018. Unifying Particle-Based and Continuum Models of Hillslope Evolution With a Probabilistic Scaling Technique. Journal of Geophysical Research: Earth Surface, 123, 3124–3146. 10.1029/2018JF004612 (View/edit entry)	2018	1D Particle-Based Hillslope Evolution Model	Model overview	1
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