Contents 



Preface iv 



Conversion Factors, Non-SI to SI Units of Measurement v 



1— Introduction 1 



The Prototype 1 



Purposes of Model Investigation 1 



2— The Model 3 



Model-Prototype Scale Relationships 3 



Test Equipment and Facilities 4 



3— Tests and Results 5 



Method of Constructing Test Sections 5 



Simulation of Existing Structure (Plans 1, 1A, 1A1, 1A2 and 1A3) . 5 



Summary and Development of Stability Coefficients 11 



Development of Improvement Plans 12 



Base Conditions 12 



Reef Breakwaters (Plans 2, 2A, 3, 4,4A, and 4A1) 14 



Attached Berms (Plans 5 and 6) 19 



Summary of Results (Plans 2-9) 25 



Impermeable Barrier (Plans 10 and 10A) 27 



Restacking Existing Armor (Plan 11) 30 



Summary of Results (All Improvement Plans) 31 



4— Conclusions 33 



References 34 



Figures 1-44 



Photos 1-73 



Appendix A: Notation Al 



SF298 



