CONTENTS— Continued 



Page 



XII ENERGY PEAK DISPERSION FLOATING BREAKWATERS 248 



1. Offset Floating Breakv.'ater Configuration 249 



2. Bowley Wave Barrier • 253 



XIII RESERVOIR APPLICATION FLOATING BREAKWATERS 257 



1. Slope-Floating Beach with Pontoons 258 



2. Twin-Pontoon Floating Breakwater 260 



3. Twin Water Chamber and Pontoon Floating Breakwater 261 



4. Fixed-Dissipator Floating Breakwater 262 



XIV SUMMARY AND CONCLUSIONS 265 



1. General Considerations 265 



2. Basic Groupings of Floating Breakwaters. 266 



3. Construction Materials and Structure Features 267 



4. Anchor Systems 268 



5. Comparative Cost Estimates 269 



LITERATURE CITED 270 



TABLES 



1 Three-dimensional tests of plan 1 for two sets of conditions at d = 25 feet 58 



2 Properties of single- and double-pontoon floating breakwaters 64 



3 Mooring line forces of two-dimensional model, Wave-Maze scrap-tire floating breakwater 124 



4 Twin-log floating breakwater tests No. 1 150 



5 Twin-log floating breakwater tests No. 2 153 



6 Two-dimensional experimental investigation of properties of A-frame floating breakwater 161 



7 Pneumatic breakwater tests of potential scale effects at a 50-percent wave height 



attenuation 203 



8 Comparative data for various floating breakwaters 269 



FIGURES 



1 Idealized fixed structure of finite width, height, and draft 32 



2 Theoretical coefficient of transmission, C t , past a fixed rigid structure 32 



3 Comparison of theories and experimental data for wave transmission past a fixed, rigid, 



vertical thin plate 34 



4 Effect of depth of submergence of thin, rigid, fixed vertical plate on transmission 



coefficient and power transmission theory 34 



5 Definitive sketch, single degree of freedom, mechanical vibration system 35 



6 Amplification factor and phase shift for single degree of freedom, forced harmonic 



oscillation system with various linear damping 37 



7 Measured and predicted natural periods of free oscillation of small boat under various 



mooring arrangements 38 



8 Conceptual model of surface gravity waves approaching a floating structure of arbitrary 



cross section 39 



9 Linear system describing floating breakwater performance 40 



10 Comparison of linear theoretical model and experimental data for a proposed floating 



breakwater 41 



