USER MANUAL SWAN Cycle III version 40.72A

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46 Chapter 4 Time (ISO-notation), Hs, Period (average or peak period depending on the choice given in command BOUND SHAPE), Peak Direction (Nautical or Cartesian, depending on command SET), Directional spread (in degrees or as power of cos depending on the choice given in command BOUND SHAPE). Example of a TPAR file: TPAR 19920516.1300 4.2 12. -110. 22. 19920516.1800 4.2 12. -110. 22. 19920517.0000 1.2 8. -110. 22. 19920517.1200 1.4 8.5 -80. 26 19920517.2000 0.9 6.5 -95. 28 ’fname’ [seq] The structure of the files containing 1D or 2D spectra is described in Appendix D (there is no relation with the definition of the boundary file generated by WAM or WAVEWATCH III). 1D and 2D files can be used for stationary and nonstationary boundary conditions, and for one or more than one location. The spectral frequencies (and directions in the case of a 2D spectrum) do not have to coincide with the frequencies and directions used in the present SWAN run (in a nested run SWAN will interpolate to these frequencies and directions). The coordinates of locations in the 1D and 2D files are ignored when SWAN reads this file (SWAN uses the geographical information in this BOUNDSPEC command instead). name of the file containing the boundary condition. sequence number of geographic location in the file (see Appendix D); useful for files which contain spectra for more than one location. Default: [seq] = 1 (i.e. first location). Note: a TPAR file always contains only one location so in this case [seq] must always be 1. | -> CLOSed | BOUNdnest1 NEST ’fname’ < > | OPEN | With this optional command a nested SWAN run can be carried out with the boundary conditions obtained from a coarse grid SWAN run (generated in that previous SWAN run with command NESTOUT not to be confused with option NEST in this command BOUNDNEST1). For this nested SWAN run the user has to give the CGRID command to define the computational grid before this BOUNDNEST1 command. The computational grid for SWAN in geographic space is the area bounded by the SWAN coarse run nest (SWAN boundary
Description of commands 47 points of the nest). This implies that the boundaries of the SWAN coarse run nest and the boundaries of the SWAN nested computational area should be (nearly) identical (see below). The spectral frequencies and directions of the coarse grid run do not have to coincide with the frequencies and directions used in the nested SWAN run (as defined in the CGRID command); SWAN will interpolate to these frequencies and directions in the nested run (see Section 2.6.3). To generate the nest boundary in the coarse grid run, use command NGRID. For the nested run, use the command CGRID with identical geographical information except the number of meshes (which will be much higher for the nested run). This BOUNDNEST command is not available for 1D computations; in such cases the commands SPECOUT and BOUNDSPEC can be used for the same purpose. A nested SWAN run must use the same coordinate system as the coarse grid SWAN run. For a curvi-linear grid, it is advised to use the commands POINTS or CURVE and SPECOUT instead of NGRID and NESTOUT. NEST ’fname’ CLOSED OPEN with this option the user indicates that the boundary conditions (all four sides of the computational grid) are to be retrieved from a file created by a previous SWAN run (the present SWAN run is a nested run). The spectral frequencies (and directions in the case of a 2D spectrum) of the previous run do not have to coincide with the frequencies and directions used in the present SWAN run (see command CGRID); SWAN will interpolate the energy densities to these frequencies and directions (see Section 2.6.3). name of the file containing the boundary conditions for the present run, created by the previous SWAN coarse grid run. This file is structured according to the rules given in Appendix D for 2D spectra. the boundary represented in the file is a closed rectangle; this is always the case if the NESTOUT command was used to generate the boundary condition file. the boundary represented in the file is not a closed rectangle. BOUNdnest2 WAMNest ’fname’ < |-> CRAY | | UNFormatted < > | | | WKstat | | | | | | | FREE | > [xgc] [ygc] CANNOT BE USED IN CASE OF UNSTRUCTURED GRIDS.
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SWAN USER MANUAL SWAN Cycle III ver
Page 5 and 6: Contents 1 Introduction 1 2 General
Page 7 and 8: TABLE . . . . . . . . . . . . . . .
Page 9 and 10: Chapter 1 Introduction The informat
Page 11 and 12: Chapter 2 General definitions and r
Page 13 and 14: General definitions and remarks 5 r
Page 15 and 16: General definitions and remarks 7 I
Page 17 and 18: which SWAN performs the computation
Page 19 and 20: General definitions and remarks 11
Page 27 and 28: Chapter 3 Input and output files 3.
Page 29 and 30: Chapter 4 Description of commands 4
Page 31 and 32: (h) Commands to write or plot outpu
Page 33 and 34: Description of commands 25 ’name
Page 35 and 36: Description of commands 27 Default:
Page 37 and 38: Description of commands 29 mesh. Th
Page 39 and 40: ⎛ ∆f = ⎝−1 + Description of
Page 41 and 42: Description of commands 33 • Easy
Page 43 and 44: Description of commands 35 grids ca
Page 45 and 46: Description of commands 37 y ′
Page 47 and 48: Description of commands 39 [fac]
Page 49 and 50: Description of commands 41 ’(10X,
Page 51 and 52: Description of commands 43 | | East
Page 53: Description of commands 45 CONSTANT
Page 57 and 58: Description of commands 49 CRAY WKS
Page 59 and 60: Description of commands 51 This com
Page 61 and 62: Description of commands 53 | JANSse
Page 63 and 64: Description of commands 55 [Csh3] c
Page 65 and 66: Description of commands 57 [ursell]
Page 67 and 68: Description of commands 59 [slope]
Page 69 and 70: Description of commands 61 [cgmod]
Page 71 and 72: Description of commands 63 < > [lim
Page 73 and 74: Description of commands 65 SIGIMPL
Page 75 and 76: Description of commands 67 ’sname
Page 77 and 78: Description of commands 69 (see bel
Page 79 and 80: Description of commands 71 [alpn] d
Page 81 and 82: Description of commands 73 ‘long
Page 83 and 84: | HSign | | | | HSWEll | | | | DIR
Page 85 and 86: Description of commands 77 | WLENgt
Page 87 and 88: Description of commands 79 QP DEPTH
Page 89 and 90: Description of commands 81 [tbegblk
Page 91 and 92: Description of commands 83 OUTput [
Page 93 and 94: Description of commands 85 If SWAN
Page 95 and 96: Description of commands 87 ACCUR MX
Page 97 and 98: Appendix A Definitions of variables
Page 99 and 100: Definitions of variables 91 RPER co
Page 101 and 102: Definitions of variables 93 WLEN Th
Page 103 and 104: Appendix B Command syntax B.1 Comma
Page 105 and 106:
Repetitions of keywords and/or othe
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Required data and optional data Com
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Appendix C File swan.edt Below the
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File swan.edt 103 ! | -> DEFault !
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File swan.edt 105 ! FRAME ’sname
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Appendix D Spectrum files, input an
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0.3892E-03 192.0 15.2 0.8007E-03 24
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Spectrum files, input and output 11
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Spectrum files, input and output 11
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Bibliography [1] SWAN - Implementat
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117 longitude, 8, 27, 49, 50, 85, 1
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USER MANUAL SWAN Cycle III version 40.72A

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