DETERMINE DESIGN 

 DEPTH AT STRUCTURE 



Consfderottons 



I ) Tidol ronget 

 mean 

 spring 



2) Srorm surge 



3) Variotionj of obovt 

 rectors olong structure 



NOTE Greatest depth at 

 struc'ure will no! 

 necestorily produce 

 ttie most severe 

 design condition ' 



DETERMINE BATHYMETRY 

 AT SITE 



Ensting ttydrogroptiic 

 chorls or survey doto 



BATHYMETRY 



DESIGN DEPTHS 



L. 



DETERMINE DESIGN 

 WAVE 



IS WAVE 

 DATA AVAILABLE f 



AT 

 WHAT LOCATION f 



Goge dole or visuol 



observolions 



Deep 



Visual obtervotionsor 

 ovoiloblfl hindcoil dato 



SUPPLEMENT DATA 

 BY HINDCASTING 

 Conildtrotioni : 



I ) Synoptic weather 



charts 

 ?) Wind doia 

 3) Fetch dato 



DEPTH IN 

 GENERATING AREA 



HINDCASTING TO DETERMINE 

 WAVE CLIMATE 



Considerofions : 



1) Synoptic weother 

 charts 



2) Wind doto 



3) Fetch doto 



HINDCASTING TO DETERMINE 

 WAVE CLIMATE 



Considerations . 



1) Wind doto 



2) Fetch doto 



3) Hydrogrophy 



SIGNIFICANT WAVE HEIGHT, 



RANGE OF PERIODS 



(H|/j, H|/|o ,H,/|oo ond Spectrum) 



DETERMINE DESIGN WAVE 

 AT STRUCTURE SITE 



Refraction doto available ? 

 ( oeriol photogrophs ) 



fletroction onolytit 



Diffraction onolysis 



DESIGN WAVE HEIGHT, 



DIRECTION AND CONDITION 



(Breaking, nan- breaking or broken ) 



AT STRUCTURE SITE 



FREQUENCY ANALYSIS 

 { Determine frequency of 



occurrence of design 



conditions ) 



.J 



Figure 7-6. Logic diagram for evaluation of marine environment, 



7-17 



