Geoscience Reference
In-Depth Information
for model selection that will be applicable to all modeling cases. The users should
decide themselves what model is more appropriate to the task to be solved, what model
is more accessible, etc. Therefore, direct recommendations on model choices will not
be provided; instead, some information is presented to facilitate the model selection
process. The approach proposed is that of
reductio ad absurdum
. The readers will find
below a list of different opportunities and they could exclude everything inappropriate
to reduce the scope of their choice. Some recommendations based on the authors'
experience are also presented.
6.3.5.1
Selection Possibilities for Hydrodynamic
and Transport Models
According to the spatial dimension of studied domain, we have the following spec-
trum of models:
• A zero-dimensional (0D), or one-box model, where the lagoon is repre-
sented as one box and all the variables depend only on time
• A one-dimensional (1D) model lagoon, considered as a transversally and
vertically uniform lagoon, where all the variables are functions of longi-
tudinal coordinates and time
• A two-dimensional (2D) model lagoon, considered as a vertically or a
transversally uniform lagoon, where time-dependent variables are functions
of plane (
x, y
) or vertical slice (
x,
z
) coordinates, respectively
•
A three-dimensional (3D) model lagoon, where at least one time-depen-
dent variable is a function of all spatial coordinates
The model solutions could be subdivided according to
time resolution
into the
following:
• A static solution (this solution is obtained from a governing equation that
is made time independent by averaging in time or by assuming that the
lagoon system has reached steady state and the variables can be considered
as time independent)
• A dynamic solution (variables are considered as time dependent; driving
forces are also time-dependent functions)
•
A steady-state dynamic solution (time dependent but periodic in time
steady solution during periodic or constant driving forces)
The following
simulated variables
may be included in the model:
• Level variations (in the 0D, 1D, and 2D models)
• Currents (in the 1D, 2D, and 3D models) or fluxes (in the 1D and 2D models)
• Wave parameters (2D surface field)
• Dissolved or suspended matter concentrations (in the 0D, 1D, 2D, and
3D models) and fluxes of them (in the 1D, 2D, and 3D models)
•
Dissolved or particulate matter in terms of concentrations (in the 0D, 1D,
2D, and 3D models) and fluxes (in the 1D, 2D, and 3D models)
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