128. MONTEFUSCO, L., "The Diffraction of a Plane Wave By an Isolated 

 Breakwater," Meaaanica (Journal of the Italian Associati-on of 

 Theoretical and Applied Mechanics), Vol. 3, 1968, pp. 156-166. 



Keywords: Detached breakwater. Wave diffraction 



The diffraction of a plane wave incident on an isolated breakwater 

 was studied, and the exact solution of the problem is briefly reported. 

 A general method involving energies is used to determine comparative 

 importance of the terms in the series which appear in the solution. 

 Numerical calculations were done for 12 different cases, with the wave- 

 length of the incident wave comparable to the length of the breakwater. 



129.. MORISON, J.R., "Model Study of Wave Action on Underwater Barriers," 

 Report No. HE-1 16-304, Fluid Mechanics Laboratory, University of 

 California, Berkeley, Calif., July 1949. 



Keywords: Hydraulic model (two-dimensional), Submerged breakwater. 

 Wave attenuation, Wave transmission 



The results of experiments in connection with submerged barriers 

 in the path of model waves indicate that the most effective position of 

 the barrier would be in shallow water of d/H = 2.0 to 2.5; i.e., directly 

 at the breaking point. Indications are that the most effective heights 

 of the barrier are more than two-thirds of the water depth. This condi- 

 tion gives less than a wave height of water over the barrier. From the 

 standpoint of the waves, the relatively long-period waves have more 

 transmission than do shorter waves. How far this analogy of model waves 

 can be carried with regard to ocean waves has not been demonstrated. 



130. MORROW, C.T., "Diffraction of Ocean Waves About a Breakwater," 

 Journal of the Waterways and Harbors Division ^ Vol. 92, No. WW3, 

 Aug. 1966, pp. 2S-44. Discussions by J. Miles and W. Munk, Feb. 

 1967, p. Ill; R.E. Loudon and J.W. Dunham, May 1967, pp. 266-270; 

 Closure, Nov. 1967, pp. 237-240. 



Keywords: Detached breakwater. Wave diffraction 



The diffraction about the end of a one-arm or detached breakwater 

 is analyzed here in such a way as to yield the total wave power enter- 

 ing the mouth and measure the performance of a breakwater-marina system. 

 A formula, derived from the Kirchhoff theory of diffraction, is used to 

 obtain the total wave power entering the marina mouth. A comparison is 

 made of the overall performances of the marina with and without the 

 breakwater. 



131. NAGAI, S., and KUBO, N., "Studies on Detached Breakwaters," Proceed- 

 ings of the 17th Conference on Coastal Engineering in Japan ^ 1970, 

 pp. 317-322 (in Japanese). 



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