CONTENTS 



Page 



CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (SI) 5 



SYMBOLS AND DEFINITIONS 6 



I INTRODUCTION 7 



II RIPRAP DESIGN CONSIDERATIONS 7 



1. Armor layer 8 



2. Underlayers 9 



3. Zero-Damage Stability 10 



4. Wave Period Effects 12 



5. Zero-Damage Conservatism and the Design Wave Height 12 



6. Reserve Stability 13 



7 . Location of Damage 15 



8. Wave Runup 16 



9. Overlays 23 



III SUMMARY AND CONCLUSIONS 29 



LITERATURE CITED 30 



TABLES 



1 Average values of & U /H and £$, and the standard deviations 16 



2 Example problem 3 summary 19 



3 Local wave conditions for various offshore slopes and water 



depths based on Goda's (1975) model 20 



4 Values of r for application at d s /H' <3 21 



5 Example problem 4 summary 23 



6 Example problem 5 comparison data 28 



7 Overlay stone data 29 



FIGURES 



1 Definition sketch 7 



2 Comparison of stability equations 13 



3 Reserve stability as a function of the reserve stability parameter. . . 14 



4 Relative runup for riprap slopes 17 



5 Sketch of quarrystone (riprap) embankment 21 



6 Relative runup for smooth slopes on a 1 on 10 bottom; £/L £. 0.5; 



d s /H = 1.5 22 



7 Relative runup for smooth slopes on a 1 on 10 bottom; £/L > 0.5; 



d s /Ho = 1.0 27 



4 



