Table 3 

 Example Inputs for Complex Structure Configurations in START.DAT* 



Variable 



Spur 



Groin (a) 



T 



-Groin (b) 



Diffracting Groin 

 Angled Jettv (c) with Spur (d) 



IDG 



1 





1 









1 





1 



NDG 



1 





1 









1 





1 



IXDG(I) 



1 





50 









100 





25 



YDG(I) 



350 





135 









410 





225 



DDG(I)** 



3.1 





2.0 









3.5 





1.7 



YG1** 



120 





- 









- 





- 



YGN** 



- 





- 









630 





- 



IDB 



1 





1 









1 





1 



NDB 



1 





2 









1 





1 



IXDB(I) 



1 



12 



45 



50 



50 



56 



97 



100 



25 31 



YDB(I) 



350 



400 



135 



135 



135 



135 



410 



410 



225 135 



DDB(I)** 



3.1 



3.5 



1.8 



2.0 



2.0 



2.3 



3.7 



3.5 



1.7 1.3 



* See Figure 34. 

 ** Values chosen arbitrarily. 



Seawalls 



334. Effective sections of seawalls may be defined anywhere on the 

 grid. If several seawall segments are present along the beach, they will be 

 represented by a single seawall separated by areas with locations put at 

 -9999 m or ft (depending on the units chosen) on sections of the beach not 

 protected by a seawall. Figure 35 and the tabulation that follows demonstrate 

 how two short seawall segments are represented in GENESIS. It is noted that 

 the seawall does not need to be straight but may form a "curve" to follow the 

 trend of the beach contours. This is common in placement of a rubble mound, 

 which may be represented as a seawall . The following tabulation gives the 

 y-values in a SEAWL.DAT file designed to describe two seawalls: 



145 



