CMS-Wave Model Parameters
Model Control
To setup the model parameters for CMS-Wave:
1. Go to CMS-Wave, Model Control, and turn on Allow wetting and drying and Bed friction (Figure 38),
2. Users can also specify constant or varied forward and backward reflection coefficients in Settings,
3. Water level and wind information are optional source as specified under Wave Source in addition to the spectral input data,
4. File, Save As, Wave.sim (selecting the Save As Type as
CMS-Wave Model Control File
The *.std has a maximum of 24 parameters - the first 15 parameters are more the basic ones as described in the CMS-Wave Technical Report (CHL-TR-08-13) while the remaining 9 parameters are relatively new for advanced CMS-Wave features.
Table 1. CMS-Wave parameters in STD file
Number | Variable | Argument Type | Options/Range | Description |
---|---|---|---|---|
1 | iprp | INTEGER | 0 - waves and wind input in *.eng 1 - waves only, neglect wind input in *.eng -1 - fast mode 2 - forced grid internal rotation 3 - without lateral energy flux |
Wave propagation mode. |
2 | icur | INTEGER | 0 - no current input 1 - with current input *.cur 2 -with *.cur, use only the 1st set current data |
Current interaction |
3 | ibk | INTEGER | 0 - no wave breaking output 1 - output breaking indices 2 - output energy dissipation rate |
Wave breaking output option |
4 | irs | INTEGER | 0 - no wave radiation stress calculation or output 1 - calculate and output radiation stresses 2 - calculate and output radiation stresses plus setup/max-water-level |
Radiation stress and runup options. |
5 | kout | INTEGER | >= 0 | Number of special wave output location, output spectrum in *.obs
and parameters in selhts.out |
6 | ibnd | INTEGER | 0 - no input a parent spectrum *.nst 1 - read *.nst, averaging input spectrum 2 - read *.nst, spatially variable spectrum input |
Nesting option. |
7 | iwet | INTEGER | 0 - allow wet/dry, default 1 - without wet/dry -1 allow wet/dry, output swell and local sea files -2 - output combined steering wav files -3 - output swell, local sea, and combined wav files |
Wetting and drying options. |
8 | ibf | INTEGER | 0 - no bottom friction calc 1 - constant Darcy-Weisbach coef, c_f 2 -read variable c_f file, *.fric 3 - constant Mannings n 4 - read variable Mannings n file, *.fric |
Bottom friction option. |
9 | iark | INTEGER | 0 - without forward reflection 1 - with forward reflection |
Forward reflection option. |
10 | iarkr | INTEGER | 0 - without backward reflection, 1 - with backward reflection |
backward reflection option. |
11 | akap | REAL | 0.0<=akap<=4.0 | Diffraction intensity coefficient. |
12 | bf | REAL | >=0 | constant bottom friction coef c_f or n
(typical value is 0.005 for c_f and 0.025 for Mannings n) |
13 | ark | REAL | 0.0<=ark<=1.0 | Constant forward reflection coef, global specification (0 for zero reflection, 1 for full reflection). |
14 | arkr | REAL | 0.0<=arkr<=1.0 | Constant backward reflection coef, global specification (0 for zero reflection, 1 for full reflection) |
15 | iwvbk | INTEGER | 0 - Goda-extended 1 - Miche-extended 2 - Battjes and Janssen 3 - Chawla and Kirby) |
Option for the primary wave breaking formula. |
16 | nonln | INTEGER | 0 - none, default 1 - nonlinear wave-wave interaction |
Nonlinear wave-wave interaction |
17 | igrav | INTEGER | 0 - none, default 1 - infra-gravity wave enter inlets |
Infragravity waves option. |
18 | irunup | INTEGER | 0 - none, default 1 - automatic, runup relative to absolute datum 2 - automatic, runup relative to updated MWL |
Runup option. |
19 | imud | INTEGER | 0 - Mud dissipation on, default 1 - none |
Mud dissipation option. The kinematic viscosity is specified in mud.dat in units of m^{2}/sec |
20 | iwnd | INTEGER | 0 - Spatially variable wind on, default 1 - None |
Spatially variable wind field option. The winds are specified in wind.dat in units of m/s and in the reference frame of the CMS-Wave grid |
21 | isolv | INTEGER | 0 - GSR solver, default 1 - ADI |
Matrix solver for CMS-Wave. |
22 | ixmdf | INTEGER | 0 - output ascii, default 1 - output xmdf 2 - input & output xmdf |
XMDF input and output options. |
23 | iproc | INTEGER | >=0 | Number of threads for parallel computing. Optimum number is approximately equal to the total row number divided by 300. Only for isolv = 0. |
24 | iview | INTEGER | 0 - half-plane, default 1 - full-plane |
Half-plane/full-plane option. users can provide additional input wave spectrum file wave.spc (same format as the *.eng) along the opposite side boundary an imaginary origin for wave.spc at the opposite corner; users |
Among these 24 parameters in *.std, the first 6 parameters are always required in CMS-Wave and
the remaining ones starting any parameter after the 6^{th} will be assigned to the
default values if not provided in the *.std. The more specific use and options associated with
each of these 1^{st} to 24^{th} parameters are given below.
- Full-plane – In this mode, CMS-Wave performs two half-plane runs in the same grid. The first
run is in the half-plane with the principle wave direction toward the shore. The second run is in the seaward half-plane. Upon the completion of the second run, two half-plane results are combined to one full-plane solution. Because the run time for the full-plane is approximately twice of the regular half-plane, users shall consider the full-plane mode only if the full-plane features like wave generation and propagation in a bay or around an island. An example is to run the Shark River wave case, 2009.sim, in the full plane (modify 2009.std).