coordinating beach fills, and entering changes in structure configurations. 

 The input format is defined as a six-digit number, with two digits each repre- 

 senting the year (YY) , month (MM), and day (DD) in that order, i.e., YYMMDD. 

 A full six-digit number must be specified for proper starting of the WAVES 

 file. 



231. Line A. 7: SIMDATE The simulation interval can be specified in 

 terms of either the number of time steps or the date SIMDATE in simulation 

 time. During testing and scoping, for which the model is run for only a few 

 time steps, it is convenient to use the number of time steps. In design mode 

 the dates of measured shorelines are known, and it is convenient to work in 

 simulation time. GENESIS distinguishes time step and date input through the 

 magnitude of the value of SIMDATE ; if SIMDATE is greater than or equal to 

 180,000, GENESIS will interpret it as a date, whereas if the value is smaller 

 than 180,000, GENESIS will interpret it as the number of time steps. 



232. Line A . 8 : NOUT In many situations it is very informative to 

 study the time evolution of the calculated shoreline change. For example, in 

 design mode, for which simulations are made over several years, the shoreline 

 location at the end of each month or each year may be desired. The value 

 entered here NOUT specifies the total number of simulated times when output 

 should be written to file (0UTPT.DAT, discussed below). The output of data at 

 the final time step does not have to be included, since it is a default 

 output. 



233. Line A. 9: TOUT(I) Output may be specified by either the 

 number of time steps or the corresponding dates in simulation time. The 

 number of outputs TOUT(I) (time steps or dates) specified must match the 

 number entered on Line A. 8. 



234. Line A. 10: I SMOOTH The representative contour used in the 

 internal wave calculation is calculated through an alternating direction 

 moving average algorithm. The variable ISMOOTH specifies the size of the 

 moving window over which the average is calculated. If ISMOOTH is set equal 

 to , no smoothing is performed, and the representative contour will follow 

 the shoreline. If ISMOOTH is set to N , the representative contour will be 

 a straight line parallel to one drawn between the two end points of the 

 shoreline. 



106 



