NSN 
boundary layer. Those coherent vortices amalgamate into the vortices of larger 
sizes by repeating the vortex pairing in the course of flowing down. 
  
Tozaki Cape 
    
    
Hadaka Isl. 
Tobi Isl. 
Fig. 6. Contour map of the sea surface. 
  
- 
tidal flow mmt 
ARE > -— 
m“ 
- 
a 
a 
- 
> 
- 
- 
- 
a; 
- 
- 
“0 39 
ee 
-"n 
7 O O 
^. D nm m m m m m m0 - —— e 
VO 2.5 TC 
5.2 : 
I N small-scale large- scale 
vorticity coherent - vortex coherent-vortex 
dim 
amalgamation-process 
(Dead Water) 
  
Fig. 7. Hydrodynamical image of the small scale tidal flow field. 
739 
- i fC i N