batch mode, one line will be printed in the default "log" file at each time 

 step. The time step counter is activated by setting IPRINT - 1 and sup- 

 pressed by setting IPRINT - . 



B. Waves 



238. Line B.l: HCNGF . ZCNGF . ZCNGA . The wave height change 

 factor HCNGF multiplies the wave height along the reference line (or 

 multiplies the deepwater wave height if the internal wave model in GENESIS is 

 used; see Line B.3). The wave angle change factor ZCNGF performs a similar 

 operation on the wave angle. The wave angle amount ZCNGA is added to (or 

 subtracted from, if negative) wave angles along the near shore reference line 

 (or from the deepwater wave angle if a nearshore reference line is not used). 

 The change parameters allow quick answers to be obtained to scoping questions 

 such as "What if the waves are 20 percent higher" or "What if the waves arrive 

 from 5 deg farther out of the east than the hindcast indicates?" In order to 

 run with the original, unchanged wave input (the normal situation), the value 

 of the wave height change factor is 1.0, the wave angle change factor is 1.0, 

 and the wave angle change amount is 0.0. 



239. Line B.2: DZ The depth of the offshore wave input DZ is 

 required in order to refract waves to breaking. This depth corresponds to the 

 depth at which waves originated if a refraction model was used to bring waves 

 to a nearshore reference line or the depth of the input time wave record if a 

 refraction model was not used, as specified on Line B.3. 



240. Line B.3: NWD . The value specified for the flag NWD deter- 

 mines whether the waves will be refracted internally by GENESIS from the wave 

 data contained in the input file WAVES.DAT (in which case NWD = and the 

 input wave data correspond to an offshore location) or if the file WAVES 

 already holds wave information along the nearshore reference depth line (NWD 

 =1), in which case a refraction routine (for example, RCPWAVE) has already 

 been used to bring waves to relatively shallow water. 



241. Line B.5: ISPW For simulations covering large spatial extent, 

 it may not be computationally feasible to run the wave refraction model using 

 the same (relatively fine) spatial alongshore resolution as that specified in 

 GENESIS. By setting ISPW to an integer greater than unity, the size of the 



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