CMS-Wave Model Parameters: Difference between revisions

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=Model Control=
[[File:CMSWave Model Parameters GeneralTab V13.2.12.png|thumb|right|400px|CMS-Wave Model Control window Version 13.2.12.]]
[[Image:Shark_Fig38.PNG|thumb|right|400px|CMS-Wave Model Control window.]]
= Parameters =
[[File:CMS Wave Model Control V. 13.2.12.png|500px|thumb|center]]
==CMS Wave plane mode ==
 
===Full half plane with reverse spectra===
===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 as opposed to the first run.  Upon the completion of the second run, two half-plane results are combined to one full-plane solution (Lin et al. 2012).  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.
===Half Plane===
 
== Source terms ==
CMS-Wave is a phase-averaged model for propagation of directional irre-gular waves over complicated bathymetry and nearshore where wave re-fraction, diffraction, reflection, shoaling, and breaking simultaneously act at inlets. Wave diffraction terms are included in the governing equations following the method of Mase et al. (2005). Four different depth-limiting wave breaking formulas can be selected as options including the interaction with a current. The wave-current interaction is calculated based on the dispersion relationship including wave blocking by an opposing current (Larson and Kraus 2002). Wave generation and whitecapping dissipation are based on the parameterization source term and calibration using field data (Lin and Lin 2004a and b, 2006a). Bottom friction loss is estimated from the classical drag law formula (Collins 1972).
 
== [https://cirpwiki.info/wiki/CMS-Flow:Wave-current_Interaction Current interaction] ==
 
== Bottom friction ==
Bottom friction could be assigned as constant or by a dataset inside SMS. To see more details, see the [https://cirpwiki.info/wiki/CMS-Flow_Model_Parameters#Bottom_and_wall_friction Bottom and wall friction of the CMS Flow].
Usually, the same roughness method used on CMS Wave is used on the CMS Flow parameters bottom friction.
For a detail explanation of how Bottom Friction variable is used on the CMS Wave model, see [https://cirpwiki.info/wiki/Bottom_Friction Bottom Friction]
 
==Surge Fields==
==Wind Fields==
If the spatial wind field input is required, users shall prepare a wind.dat file or *.wind (in the same format as *.cur) to provide the x- and y-component wind data corresponding to the incident wave conditions in the model grid.
 
==Matrix Solver==
https://cirpwiki.info/wiki/CMSFlow_Matrix_Solver
 
= Boundary control =
[[File:CMS Wave Model Control Boundray ControlV. 13.2.12.png|500px|thumb|center]]
Water level and wind information are optional source as specified under
Wave Source in addition to the spectral input data.
==Source==
Spatially varied spectral input – This is simply the case as in a child grid that spatially varied wave spectra are permitted to assign at user specified locations along or near the seaward boundary of the child grid. To apply spatially varied spectra for wave input without a parent grid, users will need to prepare the wave input file with the format as described in the child grid run.
 
https://cirpwiki.info/wiki/CMS-Wave_Input_Spectra
 
==Interpolation==
*Inverse distance weighting
 
The inverse-distance interpolation also referred to as Shepard interpola-tion is given by (Shepard 1968)
 
{{Equation|<math>\phi(\overrightarrow{x}) = \sum_{i=1}^N w_i \phi_i</math>|17-1}}
 
where the interpolation weights are given by
 
{{Equation|<math>w_i = \frac{d_i ^{-\rho_s}}{ \sum_{j} d_j^{-\rho_s}}</math>|17-2}}
 
where 
 
<math>\rho_s</math>  = real and positive power parameter [-]
 
d = distance between the known points <math>\overrightarrow{x_i}</math>  and the unknown interpolation points <math>\overrightarrow{x}</math>  equal to the Euclidean norm <math>d = ||\overrightarrow{x} - \overrightarrow{x}_i||</math> .
 
In this interpolation, the weight of each point decreases with distance from the interpolated point. One advantage of the inverse-distance interpolation is the interpolation weights are independent of the interpolation function, and therefore only need to be calculated once and can be saved for computational efficiency.[[User_Guide_028|[1]]]
 
== Computational spectral grid==
Spectral waves or wave parameters can be generated for the wave grid forcing, or wind direction and speeds can provide the necessary information for wind- wave generation. Full (directional) spectra can be imported into the SMS for the CMS-Wave, as well as simplified wave parameters (angle, wave height, and period, etc).
 
==Sides==
 
==Case data==
 
===Wind direction angle conversion===
*Cartesian
*Meteorologic
*Oceanographic
*Shore normal
 
===Populate from Spectra===
===Set Reference Time===
 
= Output control =
[[File:CMS Wave Model Control OutputControl. 13.2.12.png|500px|thumb|center]]
== Limit observation output ==
== Radiation stresses ==
== Sea/swell ==
==Breaking type==
 
= Options =
[[File:CMS Wave Model Control Options 13.2.12.png|500px|thumb|center]]
To include (trigger) either of wave run-up, infra-gravity wave, nonlinear wave-wave interaction, binary (xmdf or *.h5) output, multiple processors, muddy bed, and spatial wind field input is just a one-click step in the SMS interface. Additional files are required for the muddy bed and spatial wind field input.
==[https://cirpwiki.info/wiki/CMS-Flow_NUmerical_Methods:_Wetting_and_Drying Allow wetting and drying]==
 
==Infragravity wave effect==
==[https://cirpwiki.info/wiki/CMS-Wave:Diffraction Diffraction intensity]==
 
==Nonlinear wave effect==
==Run up==
==Fast-mode run==
==Roller effects==
The wave roller parametric formulation is commonly applied in the wave spectral model to modify breaking wave energy dissipation nearshore to mimic better the surf zone dynamics.  The wave roller effect used in CMS-Wave is based on the roller model developed by Zhang et al. (2014).
 
==Forward reflection==
==Backward reflection==
==Muddy bed==
If the muddy bed calculation is required, users shall prepare a mud.dat file or *.mud (in the same format as *.dep) to list the spatial varying max-imum kinematic viscosity for the entire grid (recommended maximum kinematic viscosity for mud is 0.04 m2/sec).
==Wave breaking formula==
==Date format==
 
To setup the model parameters for CMS-Wave:
To setup the model parameters for CMS-Wave:


1. Go to CMS-Wave, Model Control, and turn on Allow wetting and drying
1. Go to CMS-Wave, Model Control, Options and turn on Allow wetting and drying
and Bed friction (Figure 38),
and Bed friction


2. Users can also specify constant or varied forward and backward reflection
2. Users can also specify constant or varied forward and backward reflection
coefficients in Settings,
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
<br style="clear:both" />
To read more about CMS Wave defintions, see [https://cirpwiki.info/wiki/CMS-Wave_Model_Control CMS Wave Model Control Definitions]
 
= CMS-Wave Model Control File formats=
The CMS-Wave Options File (*.std) can have one of 3 input formats. Click one of the options below for the format description.
 
{|
|-
|1. [[Wave_NoCards|No cards - order of values on one line is very important.]] || '''(Used with SMS 11.1 and previous)'''
|-
|2. [[Wave_CardFormat1|Card-based - [value]  [!card name]]] || '''(Used with SMS 11.2 to 13.1)'''
|-
|3. [[Wave_CardFormat2|Card-based - [card name] [value(s)]]] || '''(Used with SMS 13.2 and after)'''
|}


<br style="clear:both" />
Later versions of SMS can generally read the older formats, however exceptions have been found with Type 1 and listed on that page.


= Model Parameters File =
===CMS-Wave Advanced Features===


===CMS-Wave Advanced Features===
[[CMS-Wave_File_Formats | Back to CMS-Wave File Formats]]
The most recent CMS-Wave code developed is Version 3.2.  Several new capabilities and
advanced features in this version include:
* Full-plane
* Automatic wave run-up calculation
* Infra-gravity wave
* Nonlinear wave-wave interaction
* Muddy bottom
* Binary file output
* Selection of multiple processors
* Permeable structure
* Spatially varied wind input
* Spatially varied spectral input
* Grid nesting
Users can use SMS11 or simply edit the existing model control file *.std to specify some of
these advanced features.
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.
1<sup>st</sup>      2<sup>nd</sup>    3<sup>rd</sup>    4<sup>th</sup>    5<sup>th</sup>     
6<sup>th </sup>    7<sup>th</sup>      8<sup>th</sup>    9<sup>th</sup>   
10<sup>th</sup>    11<sup>th</sup>    12<sup>th</sup>  13<sup>th</sup> 
14<sup>th</sup>  15<sup>th</sup>
iprp  icur  ibk    irs    kout  ibnd  iwet  ibf    iark  iarkr  akap  bf    ark    arkr  iwvbk
16<sup>th</sup>      17<sup>th</sup>    18<sup>th</sup>      19<sup>th</sup>     
20<sup>th</sup>    21<sup>st</sup>    22<sup>nd</sup>      23<sup>rd</sup>   
24<sup>th</sup>
nonln  igrav  irunup  imud  iwnd  isolv  ixmdf  iproc  iview
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<sup>th</sup> 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<sup>st</sup> to 24<sup>th</sup> parameters are given below.
iprp  =  0 (wave propagation with wind input in *.eng)
1 (wave propagation only, neglect wind input in *.eng)
-1 (fast mode)
2 (forced grid internal rotation)
3 (without lateral energy flux)
icur  =  0 (no current input)
1 (with current input *.cur)
2 (with *.cur, use only the 1st set current data)
ibk  =  0 (no wave break info output)
1 (output breaking indices *.brk)
2 (output energy dissipation rate *.brk)
irs  =  0 (no wave radiation stress calc)
1 (output radiation stress *.rad)
2 (calculate/output setup/max-water-level + *.rad)
kout  = number of special wave output location, output spectrum in *.obs
and parameters in selhts.out
ibnd  = 0 (no input a parent spectrum *.nst)
1 (read *.nst, averaging input spectrum)
2 (read *.nst, spatially variable spectrum input)
iwet  = 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)
ibf  =  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)
iark  =  0 (without forward reflection)
1 (with forward reflection)
iarkr =  0 (without backward reflection)
1 (with backward reflection)
akap  = 0 to 4 (diffraction intensity, 0 for zero diffraction, 4 for strong diffraction)
bf    =  constant bottom friction coef c_f or n
(typical value is 0.005 for c_f and 0.025 for Mannings n)
ark  =  0 to 1 (constant forward reflection coef, global specification,
0 for zero reflection, 1 for 100% or fully reflection)
arkr  =  0 to 1 (constant backward reflection coef, global specification,
0 for zero reflection, 1 for 100% or fully reflection)
iwvbk = 0 to 3 (option for the primary wave breaking formula:
0 for Goda-extended, 1 for Miche-extended,
2 for Battjes and Janssen, 3 for Chawla and Kirby)
nonln = 0 (none, default)  1 (nonlinear wave-wave interaction)
igrav  = 0 (none, default)  1 (infra-gravity wave enter inlets)
irunup = 0 (none, default)  1 (automatic, runup relative to absolute datum)
2 (automatic, runup relative to updated MWL)
imud  = 0 (mud.dat, default)  1 (none)  ---- useful to users who may not want to
include the mud effect when the mud.dat exists
(typical maximum kinematic viscosity in mud.dat
is 0.04 m<sup>2</sup>/sec)
iwnd  = 0 (wind.dat, default)  1 (none)  ----  useful in steering if users decide not
to read the spatially varied wind field input wind.dat
when the wind.dat file exists
isolv  = 0 (GSR solver,  default)  1 (ADI)
ixmdf  = 0 (output ascii, default) 1 (output xmdf)  2 (input & output xmdf)
iproc  = 0 (same as 1, default)  n (n processors for isolv = 0)
---- optimum n = (total row number) /300
iview  = 0 (half-plane, default) 1 (full-plane) --- in the full plane, 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 can rotate the CMS-Wave grid by 180 deg in SMS
to generate this wave.spc)
Figure 6.1 shows the CMS-Wave interface window for ''Model Control'' in SMS11.
* 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).
'''Figure 6.1 CMS-Wave ''''''''Model Control'' ''''''in SMS11.'''
===Wave Run-up, Infra-gravity Wave, Nonlinear Wave-Wave Interaction, Muddy Bed, Spatial
Wind Input===
* To include (trigger) either of wave run-up, infra-gravity wave, nonlinear wave-wave interaction,
binary (xmdf) output, multiple processors, muddy bed, and spatial wind field input is just a one-
click step in the SMS11 interface (Fig 6.1).  Additional files are required for the muddy bed and
spatial wind field input.
* If the muddy bed calculation is required, users shall prepare a mud.dat file or *.mud (in the
same format as *.dep) to list the spatial maximum kinematic viscosity for the entire grid
(recommended maximum kinematic viscosity for mud is 0.04 m<sup>2</sup>/sec)
* If the spatial wind field input is required, users shall prepare a wind.dat file or *.wind (in the
same format as *.cur) to provide the x- and y-component wind speed data corresponding to the
incident wave conditions in the model grid.
===Permeable Structure===
* Permeable structure – users will need to select and specify permeable structure cells through
SMS11 CMS-Wave ''Assign Cell Attributes'' and select ''Permeable Breakwater'' (see Fig 6.2). 
Because this permeable structure cell feature is not yet available (functional) in the present
SMS11 Beta, users need to modify the *.struct to manually assign the permeable structure cells
of interest.  Recall that each feature cell is described by four parameters, istruc, jstruc, kstruc,
and cstruc in a line format in *.struct (CMS-Wave Technical Report CHL-TR-08-13).
istruc = i-th column in the grid
jstruc = j-th row in the grid
kstruc = feature cell identity
  = 1, for adding alternative feature or structure (immersed or exposed) without
modifying the input depth
  = 2, for calculation of wave runup and overwash on beach face or structure, and
adjacent land
  = 3, for calculation of transmitted waves of a floating breakwater
  = 4, for vertical wall breakwater
  = 5, for composite or rubble-mound breakwater
  = 6, for a highly permeable structure like the pier or bridge
=7, for a low-permeable structure, like the rubble-mound breakwater
  cstruc =feature structure characteristic length
  = feature structure depth, for kstruc = 1 (assume a land cell if not provided)
  = beach/structure elevation above mean water level, for kstruc = 2 (use the input
depth if not provided; no effect for cstruc < 0)
  = floating breakwater draft, for kstruc =3 (skip if not provided or cstruc < 0.05 m)
  = breakwater/structure elevation, for kstruc = 4 or 5 (use the input depth if not
provided; immersed if cstruc < 0)
  = the permeable portion (>0, the section below the mean water depth) of a high-
crest structure for kstruc = 6 or 7
In the Figure 2 example, users can modify 2009.struct to assign South Jetty 6 seaward end
breakwater cells as permeable ones.  The top 10 lines of the modified 2009.struct is shown
below (the number 191 in the first row is the total structure cells in *.struct)
191
76  110  7  1.5
77  110  7  1.5
78  110  7 1.5
79  110  7  1.5
76 111  7  1.5
77  111  7  1.5
91  10  5
92  10  5
93 10  5
'''Figure 6.2.1 CMS-Wave ''''''''Assign Cell Attributes'' ''''''in SMS11.'''
===Grid Nesting===
* Grid Nesting – Users can use the CMS-Wave ''Assign Cell Attributes'' and ''Nesting Output'' (Fig
6.2) to specify the wave information output cells for saving spectrum data file (to serve as wave
input to a child grid run).  Figure 6.3.1 shows 6 nesting output locations (blue triangle) using the
Shark River 2009.sim case.  The nesting output file is *.nst (in the case of running CMS steering,
an additional file nst.dat is automatically generated that merge all individual cycle *.nst files).
Figure 6.3.2 shows a child grid domain (c2009.sim) within the parent grid (the child grid was
generated based on scatter points converted from the parent grid).  The child grid wave input file
(2009.nst, as generated from the parent grid) shall be assigned in the child *.std.  This can be
done by manually editing the child *.std or using the SMS ''CMS-Wave'' and ''Nest Grid'' menu
(Fig 6.3.3).
'''Figure 6.3.1 Nesting output 6 locations (blue triangle) and monitoring output 3 stations (red
square).'''
'''Figure 6.3.2 The child grid domain and spectral input stations (blue triangle).'''
'''Figure 6.3.3 CMS-Wave ''''''''Nest Grid'' ''''''and ''''''''Nesting Options'' ''''''menu in SMS11.'''
The child wave input file format is almost identical to the parent *.eng.  The only difference is that
the child wave input has additional 3 parameters (the local x and y coordinates, and local
significant wave height at the spectral wave input location) in the individual spectral header along
with the regular 5 parameters (spectral id, wind speed, wind direction, spectral peak frequency,
water level adjustment) in the parent *.eng. The top 10 lines of 2009.nst is shown below (notice
the 8<sup>th</sup> line is a spectral header for the 1<sup>st</sup> individual wave input
spectrum):
    30          35          6    167.00
0.04    0.05    0.06  0.07  0.08
0.09    0.10    0.11  0.12  0.13
0.14    0.15    0.16  0.17  0.18
0.19    0.20    0.21  0.22  0.23
0.24    0.25    0.26  0.27  0.28
0.29    0.30    0.31  0.32  0.33
9120103        9.80  -221.0  0.1200  0.00      192440.33      150712.28  0.563
0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00
0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00  0.00
To run the child grid in the steering mode, the spectral wave input file needs to be renamed to a
default “nest.dat” (overwrite the wave input filename in the child *.std). It is noted that this
“nest.dat” is only required for the child steering run. The parent grid run must be conducted and
completed first to start a child grid run irrespective of whether CMS-Wave is or is not coupled
with CMS-Flow (see more information in ERDC/CHL CHETN-IV-76).
===Spatially Varied Spectral Wave Input===
* Spatially varied spectral input – This is simply the case as in a child grid that spatially varied
wave spectra are permitted to assign at user specified locations along or near the seaward
boundary of the child grid. To apply spatially varied spectra for wave input without a parent grid,
users will need to prepare the wave input file with the format as described in the child grid run.
A FORTRAN program '''merge-eng-to-nst.exe''' is provided to combine all wave spectra files
(*.eng) from individual locations into a single wave input file in the format for spatially varied
spectral input to CMS-Wave.  Figure 6.4.1 shows the map of two locations that each location has
a wave input files available, 2009-ndbc.eng at Pt 1 (coordinates are 192,602 m and 151,037 m)
and 2009-sp154.eng at Pt 2 (coordinates are 192,315 m and 149,579 m) – recall that 2009-
ndbc.eng and 2009-sp154.eng were originally generated for the parent grid.  Figure 6.4.2 shows
running '''merge-eng-to-nst.exe''' in DOS to combine two wave input files into one single wave
input file (spatially varied spectral wave input to the child grid).  Because 2009-ndbc.eng and
2009-sp154.eng were generated respect to the shore-normal direction at 167 deg and the local
child grid orientation is 165 deg, a -2 deg direction adjustment is needed in running '''merge-eng-
to-nst.exe''' here.
It is required that all individual wave input files must cover the same period and timestamps
(users must edit the files to fill the missing data).  In the example, wave spectra at time stamps
09122000, 0912003, and 0912006 are missing in 2009-ndbc.eng, and wave spectra at timestamps
09120400 and 09121000 are missing in 2009-sp154.eng.  Two revised files, 2009-ndbc-edit.eng
and 2009-sp154-edit.eng (cover the time period from 09120103 to 09123121 in 3-hr interval) are
actually used in '''merge-eng-to-nst.exe''' to generate c2009.nst.
'''Figure 6.4.1 Child grid domain and two wave input locations Pt1 and Pt2.'''
'''Figure 6.4.2 Example of running merge-eng-to-nst.exe in DOS.'''
* Users can visit the CIRP Wiki site http://cirp.usace.army.mil/wiki/CMS-Wave for CMS-Wave
validation cases or use the link below to access and download more CMS-Wave examples
ftp://chlguest:3bit5map@134.164.34.99/Lin/CMS-Wave/CMS-Wave-Package
===Providing Sea Buoy Data to CMS-Wave===
Directional spectral data collected by NDBC or CDIP buoys can be processed as alternative
source for wave input to CMS-Wave.  Two examples are given below using CDIP 154 and NDBC
44025 standard spectral files for December 2009.
* NDBC buoy data – run '''ndbc-spectra.exe''' (FORTRAN) to read the NDBC standard directional
wave file and generate the CMS-Wave input spectral *.eng.
*# Download the NDBC standard monthly directional wave spectral file from
http://www.nodc.noaa.gov/BUOY/buoy.html (e.g., 44025_200912) - see Figs 6.5.1 to 6.5.4 for
accessing NDBC spectral data from the Web.
*# In the DOS window, run '''ndbc-spectra.exe'''
*# Responding to the on-screen input, type the NDBC spectral filename
*# Type the starting timestamp (default value is 0) for saving output files
*# Type ending timestamp (default is 99999999) for saving output files
*# Type the time interval (hr) for saving output data
*# Type 2 to save the CMS-Wave *.eng and *.txt files
*# Type the CMS-Wave input spectrum filename (*.eng)
*# Type the local shoreline orientation (the CMS-Wave grid y axis)  in clockwise polar coordinates
(deg, positive from North covering the sea, e.g., 180 deg for St Mary’s Entrance, FL/GA, or 360
deg - the wave grid orientation angle in *.sim)
*# Type the NDBC buoy location water depth (m) and then the CMS-Wave seaward boundary
mean water depth (m), e.g. Buoy 44025 has a nominal depth of 36.3 m relative to Mean Sea
Level
*# Type 1 to include wind or 0 to skip the wind input information
*# Type 1 or 2 or 3 for different choice of calculated frequency bins to complete the run – see
Fig 6.5.5 for running '''ndbc-spectra.exe''' in DOS.
*# The output files include *.txt, *.eng, *.out (time series of wave parameters at the buoy), and
*.dat (time series of shoreward wave parameters at the CMS-Wave offshore boundary).
'''Figure 6.5.1 NODC buoy data access website.'''
'''Figure 6.5.2 NODC buoy data access world map.'''
'''Figure 6.5.3 NODC buoy data access regional map.'''
'''Figure 6.5.4 NDBC buoy spectral data download website.'''
''' '''
'''Figure 6.5.5 Run ndbc-spectra.exe in DOS.'''
* CDIP buoy data - run '''cdip-spectra.exe''' (also FORTRAN code) to read the CDIP standard
directional wave file and generate the CMS-Wave input *.eng file.  Download the CDIP wave file
from http://cdip.ucsd.edu/?nav=historic&sub=data (e.g., sp154-200912) – see Figs 6.5.6 to
6.5.8.
Run '''cdip-spectra.exe''' in the DOS window similar to '''ndbc-spectra.exe''' – see Fig 6.5.9. 
Because CDIP spectral file already contains the buoy location depth information, '''cdip-
spectra.exe''' will not prompt for this depth input.  For processing either NDBC or CDIP data,
users shall check and manually fill any data gaps in *.eng and *.txt files (using the first available
spectral data from the neighboring time interval).
'''Figure 6.5.6 CDIP buoy data access website.'''
'''Figure 6.5.7 CDIP buoy data access website.'''
'''Figure 6.5.8 CDIP buoy spectral data download website.'''
'''Figure 6.5.9 Run cdip-spectra.exe in DOS.'''
----

Latest revision as of 21:24, 9 April 2025

CMS-Wave Model Control window Version 13.2.12.

Parameters

CMS Wave plane mode

Full half plane with reverse spectra

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 as opposed to the first run. Upon the completion of the second run, two half-plane results are combined to one full-plane solution (Lin et al. 2012). 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.

Half Plane

Source terms

CMS-Wave is a phase-averaged model for propagation of directional irre-gular waves over complicated bathymetry and nearshore where wave re-fraction, diffraction, reflection, shoaling, and breaking simultaneously act at inlets. Wave diffraction terms are included in the governing equations following the method of Mase et al. (2005). Four different depth-limiting wave breaking formulas can be selected as options including the interaction with a current. The wave-current interaction is calculated based on the dispersion relationship including wave blocking by an opposing current (Larson and Kraus 2002). Wave generation and whitecapping dissipation are based on the parameterization source term and calibration using field data (Lin and Lin 2004a and b, 2006a). Bottom friction loss is estimated from the classical drag law formula (Collins 1972).

Current interaction

Bottom friction

Bottom friction could be assigned as constant or by a dataset inside SMS. To see more details, see the Bottom and wall friction of the CMS Flow. Usually, the same roughness method used on CMS Wave is used on the CMS Flow parameters bottom friction. For a detail explanation of how Bottom Friction variable is used on the CMS Wave model, see Bottom Friction

Surge Fields

Wind Fields

If the spatial wind field input is required, users shall prepare a wind.dat file or *.wind (in the same format as *.cur) to provide the x- and y-component wind data corresponding to the incident wave conditions in the model grid.

Matrix Solver

https://cirpwiki.info/wiki/CMSFlow_Matrix_Solver

Boundary control

Water level and wind information are optional source as specified under Wave Source in addition to the spectral input data.

Source

Spatially varied spectral input – This is simply the case as in a child grid that spatially varied wave spectra are permitted to assign at user specified locations along or near the seaward boundary of the child grid. To apply spatially varied spectra for wave input without a parent grid, users will need to prepare the wave input file with the format as described in the child grid run.

https://cirpwiki.info/wiki/CMS-Wave_Input_Spectra

Interpolation

  • Inverse distance weighting

The inverse-distance interpolation also referred to as Shepard interpola-tion is given by (Shepard 1968)

  ϕ(x→)=∑i=1Nwiϕi (17-1)

where the interpolation weights are given by

  wi=di−ρs∑jdj−ρs (17-2)

where

ρs = real and positive power parameter [-]

d = distance between the known points xi→ and the unknown interpolation points x→ equal to the Euclidean norm d=||x→−x→i|| .

In this interpolation, the weight of each point decreases with distance from the interpolated point. One advantage of the inverse-distance interpolation is the interpolation weights are independent of the interpolation function, and therefore only need to be calculated once and can be saved for computational efficiency.[1]

Computational spectral grid

Spectral waves or wave parameters can be generated for the wave grid forcing, or wind direction and speeds can provide the necessary information for wind- wave generation. Full (directional) spectra can be imported into the SMS for the CMS-Wave, as well as simplified wave parameters (angle, wave height, and period, etc).

Sides

Case data

Wind direction angle conversion

  • Cartesian
  • Meteorologic
  • Oceanographic
  • Shore normal

Populate from Spectra

Set Reference Time

Output control

Limit observation output

Radiation stresses

Sea/swell

Breaking type

Options

To include (trigger) either of wave run-up, infra-gravity wave, nonlinear wave-wave interaction, binary (xmdf or *.h5) output, multiple processors, muddy bed, and spatial wind field input is just a one-click step in the SMS interface. Additional files are required for the muddy bed and spatial wind field input.

Allow wetting and drying

Infragravity wave effect

Diffraction intensity

Nonlinear wave effect

Run up

Fast-mode run

Roller effects

The wave roller parametric formulation is commonly applied in the wave spectral model to modify breaking wave energy dissipation nearshore to mimic better the surf zone dynamics. The wave roller effect used in CMS-Wave is based on the roller model developed by Zhang et al. (2014).

Forward reflection

Backward reflection

Muddy bed

If the muddy bed calculation is required, users shall prepare a mud.dat file or *.mud (in the same format as *.dep) to list the spatial varying max-imum kinematic viscosity for the entire grid (recommended maximum kinematic viscosity for mud is 0.04 m2/sec).

Wave breaking formula

Date format

To setup the model parameters for CMS-Wave:

1. Go to CMS-Wave, Model Control, Options and turn on Allow wetting and drying and Bed friction

2. Users can also specify constant or varied forward and backward reflection coefficients in Settings,



To read more about CMS Wave defintions, see CMS Wave Model Control Definitions

CMS-Wave Model Control File formats

The CMS-Wave Options File (*.std) can have one of 3 input formats. Click one of the options below for the format description.

1. No cards - order of values on one line is very important. (Used with SMS 11.1 and previous)
2. Card-based - [value] [!card name] (Used with SMS 11.2 to 13.1)
3. Card-based - [card name] [value(s)] (Used with SMS 13.2 and after)

Later versions of SMS can generally read the older formats, however exceptions have been found with Type 1 and listed on that page.


Back to CMS-Wave File Formats

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