Property:Describe numerical limitations
From CSDMS
This is a property of type Text.
P
Code is research grade +
G
Concerns about extrapolations beyond range of data used for model calibration and parameterization. +
W
Q
G
Currently only shallow water equations are solved, using explicit finite volume methods. High order Boussinesq equations to better model dispersive waves (e.g. for short wavelength submarine landslide generated tsunamis) would require implicit time stepping and is still in the experimental phase. +
E
D8 flow codes are used to compute contributing areas. Would be better to use D-Infinity or the Mass-Flux method. +
L
P
C
G
Documentation provides a description of the available processes and associated limitations:
https://gospl.readthedocs.io/en/latest/tech_guide/index.html +
Does not consider influence of cross-shore sand transport, not intended for short-term storm-induced shoreline change. No wave reflection from structures. No direct provision for changing tide level. +
H
Dpeending on the size of the DEM this can be quite a slow process, particularly the third step. +
W
Dynamics, chemistry, RT, microphysical, and slab ocean model are all coupled, thus the model runs slowly. +
G
Equation set is still and uses robust but relatively inefficient solvers. Recommend testing with coarse grid resolutions (say, 20x20 cells) before attempting larger/finer grids. +
Explicit forward in time finite volume method limits maximum timestep/resolution combination. This can be managed using the adaptive timestep solver that is included. +
W
Explicit schemes make high resolution runs expensive. +
D
Explicit solver can go unstable, and it is not always obvious. Make sure to check resulting soil depths in the landscape to look for instabilities. +
S
Extreme deformation of mesh is expected during large deformationin the updated Lagrangian formulation but prevented by regridding. The numerical diffusion due to regridding, however, can sometime make structures (e.g. shear localization) lose desired sharpness.
Regridding itself fails from time to time. +
B
