Model:DepthDependentTaylorDiffuser

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DepthDependentTaylorDiffuser


Metadata

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
Model citations
Nr. of publications: 1
Total citations: 232
h-index: 1
m-quotient: 0.1
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Introduction

History

References



Nr. of publications: 1
Total citations: 232
h-index: 1
m-quotient: 0.1


Featured reference(s) Open Access Status Year Type of Reference Cited
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, 521–46. 10.5194/esurf-5-21-2017
cc-by · publishedVersion		 2017 a module overview describing a module 232


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