]>
2022-08-14T15:52:55-06:00
Model:AR2-sinuosity
3002
en
0
Charlottesville
1
Single Processor
United States
No
Examples of model output are available in the following data repository:
Limaye, A. B., 2021, Sinuosity data for numerically modeled and natural channels, University of Virginia Dataverse, https://doi.org/10.18130/V3/TRTTIS.
AR2 model parameters, as defined in wrapper script
The geometry of a channel centerline is represented as a direction series using a second-order autoregressive formulation. The governing equation is
theta(i) = b_1*theta(i-1) + b_2*theta(i-2) + epsilon(i)
where theta is the channel direction, i is the centerline node index, b_1 and b_2 are coefficients, and epsilon is a random disturbance drawn from a normal distribution with a mean of zero.
The channel is represented by a set of linked nodes. There are no intrinsic constrains for length scale or resolution.
Some parameter values result in channels that self-intersect. The code outputs both the raw centerline and a simplified centerline with self-intersections removed.
Channel centerlines and associated model parameters
Channel planform geometry
Not applicable - the model generates static channel planforms.
Only maintenance
2021
No
2021
This code creates the channel centerline (i.e., the line equidistant between two banks) for a single thread-channel, using a second-order autoregressive model. The code implements a model for random centerlines proposed by Ferguson, R. I. (1976) Disturbed periodic model for river meanders, Earth Surface Processes 1(4), 337-347, doi:10.1002/esp.3290010403. This implementation also includes (1) controls for the node spacing and extent of channels, (2) removal of self-intersecting (cutoff) loops from modeled centerlines, and (3) a wrapper script to sweep model parameter space and generate alternate realizations using different random disturbance series.
Ajay
Department of Environmental Sciences, University of Virginia
Limaye
0
No
Variable, but minimal for processing any one centerline
Terrestrial
Hydrology
Planetary landforms
Disturbed periodic model for river meanders
As code
Single
generates
model
earth surface processes
second-order autoregressive model
single thread-channel
line equidistant
second-order autoregressive
earth surface
surface processes
disturbed periodic model
code creates
autoregressive model
proposed by ferguson
disturbed periodic
banks
thread-channel
ar2-sinuosity
1
Generates planforms for single-thread channel using a second-order autoregressive model
MATLAB .mat file
false
291 McCormick Rd.
22904
false
GPL v2
Matlab
Minutes
Through web repository
https://github.com/alimaye/AR2-sinuosity
2D
Landscape-Scale
Watershed-Scale
Reach-Scale
Virginia
Linux
Mac OS
Windows
Matlab
true
2021-07-27T02:23:01Z
2459422.5993171
2021-07-27T02:29:52Z
2459422.6040741
AR2-sinuosity
3002
0
plainlist
1
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[[Model:+]] [[First name::Ajay]] [[Last name::Limaye]]
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