SURFACE WAVE 

 HEIGHT 

 DAS -2 



ZIOsec. 



1-50^- 



HEIGHT OF SUSPENDED SAND 



2cm.r 



1 60 



TIME. SEC. 



igure 18, 



Orbital Motion and Sand Suspension Measured off the Scripps Institution 

 Pier Employing the Instrument Layout Shown in Figure 17. Surface wave 

 height measured by digital wave staff and obtained from the rrlagnetic tape 

 read-out. The orbital velocity and heights of suspended sand were obtained 

 from underwater motion pictures synchronized as shown in Figure 12. 



34 



