235. Line A. 11: IRWM . The variable IRWM allows the user to 

 suppress printout of repeated warning messages (see the section "Error and 

 Warning Messages"). For example, if a preliminary or scoping analysis is 

 being performed with a long time step, the value of the stability parameter 

 STAB (called R s in the main text) is likely to exceed 5.0, and a warning 

 message will be issued at every time step. If IRWM is set equal to zero, 

 only one warning message will be given, and the screen and output file SETUP 

 will not be cluttered with warning messages. In planning and design applica- 

 tions, the modeler will want to be aware of potentially undesirable conditions 

 and should set IRWM = 1 . 



236. Line A. 12: Kl . K2 Values of the longshore sand transport 

 calibration coefficients Kl and K2 (called "K^ 1 and "K 2 " in the main 

 text) require adjustment in the process of model calibration. For sandy 

 beaches experience has shown that values are typically in the ranges of 

 0.1 < Kl < 1.0 and 0.5K1 < K2 < 1 . 5K1 . Initial trial runs might use 



Kl = 0.5 and K2 = 0.25 . The transport parameter Kl controls the time 

 scale of the calculation and is the principal calibration coefficient in 

 GENESIS. Further discussion is given in Part V. (Note: the above-mentioned 

 values of Kl and K2 correspond to rms wave height. Significant wave 

 height should be entered in the WAVES file, however, as GENESIS automatically 

 converts heights in the wave file from significant to rms.) 



237. Line A. 13: IPRINT A computer program, in this case GENESIS, 

 can be executed in two ways on most mainframe computers, by interactive mode 

 (sometimes called demand mode) and by batch mode. In interactive mode, 

 instructions are entered from the keyboard and reproduced on the monitor or 

 printer; in this mode the terminal launching the job is devoted fully to 

 execution of the program. In batch mode, the job is launched through a batch 

 file devised by the user. The batch file contains commands and other data 

 required to run the program and acts as a substitute for entries made at the 

 keyboard. A job launched in batch mode will execute in the background and 

 free the user's terminal for other applications. If GENESIS is executed in 

 interactive mode, through IPRINT a counter can be requested to appear on the 

 screen to show the time step presently being executed. The counter will be 

 updated without causing the screen to scroll. If the counter is activated in 



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