Figure 20. Wave amplitude variation along constant depth part of the 



flume. T = 2.0 sec, Tan 3^ = 1/1.5. Curve corresponds to 

 theoretical variation, equation (123), with R = 0.88. 









"1 



rn 



PI 





— 1 







p 



rn 





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■x, ...^(.4-r-- 1 i .1. ■ ., I;, 1 1 1 J,_N^ 1,. I ■ 



-T 









-■ 















































































Figure 21. Wave record showing pronounced second harmonics at a node 

 for experiments presented in Figure 20. 



66 



