SYMBOLS AND DEFINITIONS—Continued 



r radial distance 



Tp radius from the center of curvature to where the wave ray turns 

 parallel to the bottom contours 



S slope of sea bottom in direction of wave motion 



S, slope of steep transition 



S 2 slope of shelf 



S~ nearshore slope 



s distance along a wave ray 



T wave period 



Tg bottom shear stress 



T^ natural period of harbor inside breakwater 



T n n vn mode of oscillation 



th 

 T„ component period of Earth vibration 



T 1 period of bay or inlet 



T lg natural period of inlet with effective length, L g 



t time 



t s time required for a wave to travel across a shelf 



U normalized wave amplitude 

 • (H/d)(L/d) 2 



u current or particle velocity in direction of wave motion 

 •velocity in the 6-direction (spherical coordinates) 



u s current velocity of tsunami surge at the shoreline 



u* a convection term 



V volume of water 



14 



