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

 facilitate use of the model, the coordinates of small groins, as specified on 

 Line D.4, and other structures are given in the total coordinate system. In 

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

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

 However, only those structures that appear inside the portion of the beach 

 being modeled should be specified. 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 omitting these grid 

 cell numbers from Line D.4 and the corresponding lengths on Line D.5. 



30. ERROR. TOO MANY BEACH FILLS. Many arrays in the FORTRAN code 

 depend on the number of beach fills. The largest possible number is 50. This 

 error message will appear if NBF on Line 1.3 is greater than 50 and is 

 remedied by reducing NBF accordingly. As NBF is changed, corresponding 

 changes must be introduced on Lines 1.4 and 1.5, as the number of data entries 

 on these lines must correspond to the number of beach fills as specified on 

 Line 1.3. The number of beach fills can be reduced by splitting up the beach 

 in portions and then performing the simulations for one portion of the beach 

 at a time. 



31. ERROR. TOO MANY DETACHED BREAKWATERS. Many arrays in the FORTRAN 

 code depend on the number of detached breakwaters. The largest possible 

 number is 20. This message will appear if NDB on Line G.3 is greater than 

 20 and is remedied by reducing NDB accordingly. As NDB is changed, cor- 

 responding changes must be introduced on Lines G.4 to G.9, as the number of 

 data entries on these lines must correspond to the number of structures as 

 specified on Line G.3. The number of structures can be reduced by splitting 

 up the beach in portions and then performing the simulations for one portion 

 of the beach at a time. 



32. ERROR. TOO MANY DIFFRACTING GROINS. Many arrays in the FORTRAN 

 code depend on the number of diffracting groins. The largest possible number 

 is 20. This error will appear if NDG on Line E.3 is greater than 20 and is 

 remedied by reducing NDG accordingly. As NDG is changed, corresponding 

 changes must be introduced on Lines E.4 to E.6, as the number of data entries 



C10 



