APPENDIX A: ANNOTATED BIBLIOGRAPHY 



Bowen, A. J., and Guza, R. T. 1978. "Edge Waves and Surf Beat," 

 Journal of Geophysical Research, Vol 83, No. C4, pp 1913-1920. 



The nonlinear interaction of incident waves was considered as a mecha- 

 nism for producing edge waves. Gallagher's (1971) model, edge wave forcing 

 from interacting incident waves, was discussed and tested in laboratory wave 

 tank. The experimental results found that surf-beat energy was greatest when 

 resonance conditions for edge wave growth were satisfied, even when the inci- 

 dent waves were breaking. The laboratory experiment was centered around the 

 case of two wave trains of slightly different frequencies approaching from the 

 same deep-water direction. The mathematical descriptions and theoretical der- 

 ivations in this article are moderately complex, more appropriate for the 

 individual already familiar with edge waves. 



Bowen, A. J., and Inman, D. L. 1971. "Edge Waves and Crescentic 

 Bars," Journal of Geophysical Research, Vol 76, No. 36, pp 8662-8671. 



This article was the first to tie edge waves with the formation of peri- 

 odic beach morphologies, in particular crescentic bars and beach cusps. Theo- 

 retical arguments were developed for the production of crescentic bars by edge 

 waves; a laboratory wave tank experiment was used to confirm the theory. It 

 was shown that longshore standing edge waves are capable of producing crescen- 

 tic bars that have a longshore wavelength of one-half that of the edge wave. 



Gallagher, B. 1971. "Generation of Surf Beat by Non-Linear Wave 

 Interactions," Journal of Fluid Mechanics, Vol 49, Part 1, pp 1-20. 



The nonlinear interaction of two incident wave trains was suggested as a 

 possible mechanism for transferring energy to low-frequency waves. It was 

 shown that for certain combinations of incident wave frequencies and direc- 

 tions that satisfy the edge wave dispersion relationship, free edge waves 

 trapped to the shore could be produced. However, this model was restricted to 

 interactions in shallow water outside the surf zone; processes inside the surf 

 zone have been neglected. A section was included on the derivation of the 

 response spectrum which involves moderately complex mathematics. 



Guza, R. T., and Thornton, E. B. 1982. "Swash Oscillations on a 

 Natural Beach," Journal of Geophysical Research, Vol 87, No. C1, 

 pp 483-491. 



The authors demonstrated that wave breaking in the inner surf zone lim- 

 its the energy at wind wave frequencies, but not at infragravity (surf-beat) 

 frequencies. Swash oscillations were measured on a gently sloping beach with 

 a wide range of incident wave conditions. The energy densities of the runup 

 at incident wave frequencies were found to be independent of the offshore wave 

 conditions, suggesting the energy was saturated because of wave breaking. 

 However, run-up energy in the infragravity region increased nearly linearly 

 with the offshore wave energy. Significant vertical excursion of these swash 

 oscillations was approximately 70 percent of the offshore significant wave 



heights. The authors observed a roll-off slope of frequency J in the 



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