START file. The dates when the beach fills end are specified by values of 

 BFDATE entered on Line 1.5. Each date must be entered as one number in the 

 format YYMMDD. This error message will appear if, for any of these dates, the 

 number of the day is greater than 31 or if the number of the month is greater 

 than 12. 



26. ERROR. INCORRECT FORMAT OF SIMULATION START DATE. The date 

 specifying when the calculation starts is contained in the value of SIMDATS 

 entered on Line A. 6 in the START file. This date must be entered as one 

 number in the format YYMMDD. This message will appear if the number of the 

 day is greater than 31 or if the number of the month is greater than 12. 



27. ERROR. SEAWALL IS OUTSIDE CALCULATION GRID. GENESIS has the 

 option of performing simulations over a portion of the beach through specifi- 

 cation of grid cell numbers other than 1 and N+l where the simulation 

 starts and ends. These numbers are entered on Line A. 4 in the START file. To 

 facilitate use of the model, the coordinates of seawalls, as specified on Line 

 H.3, and other structures are always given in the total coordinate system. In 

 this way the modeler does not have to change the coordinates of the structures 

 if he or she targets one portion of the beach or another for modeling. 

 However, the user must input only that part of the seawall that appears inside 

 the portion of the beach presently being modeled. GENESIS transforms the 

 coordinates from the total coordinate system to the local system covering a 

 portion of the beach. This message will appear if the recalculated grid cell 

 numbers fall outside the range of the local grid and is remedied by setting 

 ISWBEG , on Line H.3, equal to the grid cell number where the simulation 

 starts if the right side of the seawall is outside the grid or by setting 

 ISWEND equal to the grid cell number where the simulation ends if the left 

 side of the seawall is outside the grid. 



28. ERROR. SIMULATION ENDING DATE MUST BE GREATER THAN THE STARTING 

 DATE. The ending date of the simulation as specified on Line A. 7 in the START 

 file must be given as one number in format YYMMDD. If an incorrect format is 

 used, GENESIS may interpret the ending date as earlier than the start date. 



29. ERROR. SMALL GROIN OUTSIDE CALCULATION GRID. GENESIS has the 

 option of performing simulations over a portion of the beach through specifi- 

 cation of grid cell numbers other than 1 and N+l where the simulation 



C9 



