Figure 1-8. Scarp formed in random wave erosion test 



ST 20: Acoustic profiler tests, random and monochromatic waves 



Three days of tests were performed with both random and monochromatic 

 waves to provide varied conditions for the acoustic profiling instruments locat- 

 ed in the offshore. The waves were generally lower in amplitude than ST10. 

 The tests were also of interest to the hydrodynamics group. Figure 1-9 shows 

 two acoustic-Doppler current profile sensors raised out of the water for adjust- 

 ment. 



ST 30: Accretion toward equilibrium, random waves 



This test was designed to produce accretion of the beach under low steep- 

 ness random waves with long periods (6-10 sec) and heights of 0.4 to 0.5 m. 



ST 40: Dedicated hydrodynamics 



This 3-day test included time-varying wave conditions, varying spectral 

 width, and bimodal spectra. The wave runs were 30 to 60 min in duration, 

 covering a multiplicity of wave conditions. 



16 



Chapter 1 Introduction to SUPERTANK 



