Model:TaylorNonLinearDiffuser

TaylorNonLinearDiffuser

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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	Landscape-Scale, Watershed-Scale
Model domain	Terrestrial, Hydrology
One-line model description	Model non-linear soil creep after Ganti et al. (2012)
Extended model description	Hillslope evolution using a Taylor Series expansion of the Andrews-Bucknam formulation of nonlinear hillslope flux derived following following Ganti et al., 2012. The flux is given as: qs = KS ( 1 + (S/Sc)2 + (S / Sc)4 + .. + (S / Sc)**2(n - 1) ) where K is is the diffusivity, S is the slope, Sc is the critical slope, and n is the number of terms. The default behavior uses two terms to produce a flux law as described by Equation 6 of Ganti et al., (2012).

Keywords:	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
Institute / Organization
Postal address 1
Postal address 2
Town / City
Postal code
State
Country	United States
Email address	katherine.barnhart@colorado.edu
Phone
Fax

Name	Greg Tucker
Type of contact
Institute / Organization
Postal address 1
Postal address 2
Town / City
Postal code
State
Country	United States
Email address	gtucker@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	2017
Does model development still take place?	No
If above answer is no, provide end year model development	2020
Code development status	Only maintenance
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 slope 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). dynamic_dt : boolean (optional, default is False) Keyword argument to turn on or off dynamic time-stepping. if_unstable : string (optional, default is "pass") Keyword argument to determine how potential instability due to slopes that are too high is handled. Options are "pass", "warn", and "raise". courant_factor : float (optional, default = 0.2) Factor to identify stable time-step duration when using dynamic timestepping.
Input format	ASCII
Other input format
Describe output parameters	"soil__flux": { "dtype": float, "intent": "out", "optional": False, "units": "m^2/yr", "mapping": "link", "doc": "flux of soil in direction of link", } "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

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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 "Code IRF or not" 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

Can be coupled with:

Model info

Authors

Rachel Glade

Barnhart, Tucker

Source code

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