80. Three additional input files are accessed by RCP865J and RCP205J. 

 They must reside on the user's permanent file space. These files contain in- 

 formation describing grid characteristics and wave conditions to be simulated, 

 data controlling the amount of printed output, bottom bathymetry for each grid 

 cell, and any changes to the model source code. The general format of each of 

 these files is independent of the CDC machine being used to execute the wave 

 model. However, one additional source code modification must be made when 

 running on the CYBER 205. It will be discussed later in this section. In the 

 following text, all three input files will be addressed using the names given 

 to them in Figures 5 and 7— RCPDATA, RCPDEPT, and RCPUPDT. 



81. RCPDATA contains grid information, specifically the size and number 

 of cells in the grid. It contains deepwater wave characteristics (height, pe- 

 riod, and direction) describing wave conditions to be simulated, and it con- 

 tains data which control the volume of printed output. These, along with all 

 other input parameters, are described below. Following each parameter, in 

 parentheses, is its corresponding value taken from the sample input data file 

 shown in Figure 8. 



FIELD RESEARCH FACILITY (DUCK , NC) EXAMPLE 



75 12.0 50 24.0 9.800 0.0 2 0.90 

 2.00 12.00 20.00 

 1.50 8.00 -35.00 

 1 50 1 11 41 

 1 



Figure 8. Sample input data file for a 

 wave model application 



82. A detailed description of the input parameters follows: 



a. CARD 1 - FORMAT (7A10). 



LTITLE - A 70-character array describing the model application 

 being considered. 



(FIELD RESEARCH FACILITY (DUCK, NC) EXAMPLE) 



b. CARD 2 - FORMAT (15, F10.4, 15, F10.4, 2F10.2, 15, F10.2). 



M - Number of grid cells in the x-direction (75) 



DX - Cell size in the x-direction (12.0) 



N - Number of cells in the y-direction (50) 



DY - Cell size in the y-direction (24.0) 



G - Gravitational acceleration constant (9.800) 



Note: The parameter G controls the units of all input 



and output variables. The choice shown above (9.800) 



46 



