Figure 1-19. Wave impact on wall in Seawall Test 3 



ST GO: Erosion toward equilibrium, monochromatic waves 



Erosive, monochromatic waves were run for an extended time to approach 

 an equilibrium profile shape. 



ST HO: Erosion, transition toward accretion, monochromatic waves 



Following the previous erosion test, wave height was decreased over sev- 

 eral runs to produce accretionary conditions, as a gradual transition from 

 storm waves to post-storm recovery waves. 



ST JO: Accretion toward equilibrium, monochromatic waves 



Accretionary monochromatic waves were run for an extended time to ap- 

 proach an equilibrium profile shape. 



ST JO: Narrow-crested offshore mound 



A weekend was spent filling the channel between Stations 12 and 13 with 

 sand that was graded to form a massive narrow-crested mound to break 

 waves. Three pipes were placed under the mound for water carried forward 

 with the waves to circulate back to the offshore end of the tank. The current 



24 



Chapter 1 Introduction to SUPERTANK 



