FIGURE PAGE 



2-24 Refraction by a Submarine Ridge and Submarine Canyon . . . 2-77 



2-25 Refraction Along an Irregular Shoreline 2-77 



2-26 Wave Incident on a Breakwater 2-80 



2-27 Wave Diffraction at Channel Islands Harbor Breakwater, 



California 2-82 



2-28 Wave Diffraction Diagram - 15° Wave Angle 2-83 



2-29 Wave Diffraction Diagram - 30° Wave Angle 2-84 



2-30 Wave Diffraction Diagram - 45° Wave Angle 2-85 



2-31 Wave Diffraction Diagram - 60° Wave Angle 2-86 



2-32 Wave Diffraction Diagram - 75° Wave Angle 2-87 



2-33 Wave Diffraction Diagram - 90° Wave Angle 2-88 



2-34 Wave Diffraction Diagram - 105° Wave Angle 2-89 



2-35 Wave Diffraction Diagram - 120° Wave Angle 2-90 



2-36 Wave Diffraction Diagram - 135° Wave Angle 2-91 



2-37 Wave Diffraction Diagram - 150° Wave Angle 2-92 



2-38 Wave Diffraction Diagram - 165° Wave Angle 2-93 



2-39 Wave Diffraction Diagram - 180° Wave Angle 2-94 



2-40 Diffraction for a Single Breakwater Normal Incidence . . . 2-95 



2-41 Schematic Representation of Wave Diffraction Overlay . . . 2-97 

 2-42 Generalized Diffraction Diagram for a Breakwater Gap 



Width of Two Wave Lengths (B/L = 2) 2-99 



2-43 Contours of Equal Diffraction Coefficient; Gap Width = 



0.5 Wave Length (B/L =0.5) 2-100 



2-44 Contours of Equal Diffraction Coefficient; Gap Width = 



1 Wave Length (B/L = 1) 2-100 



2-45 Contours of Equal Diffraction Coefficient; Gap Width = 



1.41 Wave Lengths (B/L = 1.41) 2-101 



2-46 Contours of Equal Diffraction Coefficient; Gap Width = 



1.64 Wave Lengths (B/L =1.64) 2-101 



2-47 Contours of Equal Diffraction Coefficient; Gap Width = 



1.78 Wave Lengths (B/L =1.78) 2-102 



2-48 Contours of Equal Diffraction Coefficient; Gap Width = 



2 Wave Lengths (B/L =2) 2-102 



2-49 Contours of Equal Diffraction Coefficient; Gap Width = 



2.50 Wave Lenghts (B/L =2.50) 2-103 



2-50 Contours of Equal Diffraction Coefficient; Gap Width = 



2.95 Wave Lengths (B/L = 2,95) 2-103 



2-51 Contours of Equal Diffraction Coefficient; Gap Width = 



3.82 Wave Lengths (B/L = 3.82) 2-104 



2-52 Contours of Equal Diffraction Coefficient; Gap Width = 



5 Wave Lengths (B/L =5) 2-104 



2-53 Diffraction for a Breakwater Gap of Width > 5L (B/L > 5) . 2-105 



2-54 Wave Incidence Oblique to Breakwater Gap 2-105 



2-55 Diffraction for a Breakwater Gap of One Wave Length Width 



((J) = and 15°) 2-106 



2-56 Diffraction for a Breakwater Gap of One Wave Length Width 



((fi = 30 and 45°) 2-107 



2-57 Diffraction for a Breakwater Gap of One Wave Length Width 



((|) = 60 and 75°) 2-108 



Xtl 



