Model:DepthDependentTaylorDiffuser

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DepthDependentTaylorDiffuser

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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 LandLab Note on status model Date note status model Incorporated models or components: Spatial dimensions 2D Spatial extent Patch-Scale, Reach-Scale, Watershed-Scale Model domain Terrestrial One-line model description This component implements a depth-dependent Taylor series diffusion rule, combining concepts of Ganti et al. (2012) and Johnstone and Hilley (2014). Extended model description Hillslope sediment flux uses a Taylor Series expansion of the Andrews-Bucknam formulation of nonlinear hillslope flux derived following following Ganti et al., 2012 with a depth dependent component inspired Johnstone and Hilley (2014). The flux :math:`q_s` is given as: q_s = DSH^* ( 1 + (S/S_c)^2 + (S/Sc_)^4 + .. + (S/S_c)^2(n-1) ) (1.0 - exp( H / H^*) where :math:`D` is is the diffusivity, :math:`S` is the slope, :math:`S_c` is the critical slope, :math:`n` is the number of terms, :math:`H` is the soil depth on links, and :math:`H^*` is the soil transport decay depth. The default behavior uses two terms to produce a slope dependence as described by Equation 6 of Ganti et al., (2012).This component will ignore soil thickness located at non-core nodes. Keywords: soil creep, hillslope, diffusion, Name Rachel Glade Type of contact Model developer Institute / Organization Postal address 1 Postal address 2 Town / City Los Alamos Postal code 87544 State Country United States Email address rachel.glade@colorado.edu Phone Fax Name Katy Barnhart Type of contact Technical contact Institute / Organization Postal address 1 Postal address 2 Town / City Postal code State Country United States Email address Phone Fax Name Greg Tucker Type of contact Project manager Institute / Organization Postal address 1 Postal address 2 Town / City Postal code State Country United States Email address 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 2016 Does model development still take place? No If above answer is no, provide end year model development 2019 Code development status Active When did you indicate the 'code development status'? 2020 Model availability As code Source code availability (Or provide future intension) Through web repository Source web address https://github.com/landlab/landlab/tree/master/landlab Source csdms web address Program license type BSD or MIT X11 Program license type other Memory requirements Typical run time Describe input parameters grid: ModelGrid Landlab ModelGrid object linear_diffusivity: float, optional. Hillslope diffusivity, m**2/yr Default = 1.0 slope_crit: float, optional Critical gradient parameter, m/m Default = 1.0 soil_transport_decay_depth: float, optional characteristic transport soil depth, m Default = 1.0 nterms: int, optional. default = 2 number of terms in the Taylor expansion. Two terms (default) gives the behavior described in Ganti et al. (2012). Input format ASCII Other input format Describe output parameters _info = { "bedrock__elevation": { "dtype": float, "intent": "out", "optional": False, "units": "m", "mapping": "node", "doc": "elevation of the bedrock surface", }, "soil__depth": { "dtype": float, "intent": "inout", "optional": False, "units": "m", "mapping": "node", "doc": "Depth of soil or weathered bedrock", }, "soil__flux": { "dtype": float, "intent": "out", "optional": False, "units": "m^2/yr", "mapping": "link", "doc": "flux of soil in direction of link", }, "soil_production__rate": { "dtype": float, "intent": "in", "optional": False, "units": "m/yr", "mapping": "node", "doc": "rate of soil production at nodes", }, "topographic__elevation": { "dtype": float, "intent": "inout", "optional": False, "units": "m", "mapping": "node", "doc": "Land surface topographic elevation", }, "topographic__slope": { "dtype": float, "intent": "out", "optional": False, "units": "m/m", "mapping": "link", "doc": "gradient of the ground surface", }, } 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 Describe key physical parameters and equations Describe length scale and resolution constraints Describe time scale and resolution constraints 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 https://landlab.github.io Model forum / discussion board https://github.com/landlab/landlab/issues Comments This part will be filled out by CSDMS staff OpenMI compliant BMI compliant WMT component PyMT component Is this a data component Can be coupled with:

Model info Authors Rachel Glade Barnhart, Tucker Source code Go to external source code site Model citations Nr. of publications: 1 Total citations: 178 h-index: 1 m-quotient: 0.11 QR-code Link to this page Other models by author DepthDependentDiffuser DepthDependentTaylorDiffuser ExponentialWeatherer Hogback TaylorNonLinearDiffuser

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Nr. of publications:	1
Total citations:	178
h-index:	1
m-quotient:	0.11

Featured publication(s)	Year	Model described	Type of Reference	Citations
Hobley, Daniel E. J.; Adams, Jordan M.; Nudurupati, Sai Siddhartha; Hutton, Eric W. H.; Gasparini, Nicole M.; Istanbulluoglu, Erkan; Tucker, Gregory E.; 2017. Creative computing with Landlab: an open-source toolkit for building, coupling, and exploring two-dimensional numerical models of Earth-surface dynamics. Earth Surface Dynamics, 5, 21–46. 10.5194/esurf-5-21-2017 (View/edit entry)	2017	ChannelProfiler DepthDependentTaylorDiffuser Landlab LinearDiffuser	Model overview	178
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