(e) The difference in slope in the outer offshore zone may have 
been the result of secondary wave or re-reflection effects due to the 
difference in initial test length (Figs. 12 to 19), but were most likely 
due to the strong circulation pattern in the narrower tank. 
(f) Reflection coefficient variation, development and disintegration 
of current patterns, and profile development in experiment 72A-06 were 
strongly interrelated. 
2. Recommendations. 
(a) The final profile shape in experiment 72A-10 could be used as 
an approximation to an equilibrium profile for these wave, sediment, and 
initial slope conditions (Fig. 42), provided the critical conditions 
leading to circulation (as in Fig. 39) can be avoided. 
(b) More research should be conducted on the effect of initial test 
length on re-reflection and secondary waves and the resulting effects on 
profile development. 
8 | 
