SECTION 



PAGE 



CHAPTER 8 - ENGINEERING ANALYSIS - CASE STUDY 



, 1 INTRODUCTION 8-1 



,2 DESIGN PROBLEM CALCULATIONS--ARTIFICIAL OFFSHORE 



ISLAND 8-2 



GENERAL PROBLEM DESCRIPTION 8-2 



DESCRIPTION OF PHYSICAL ENVIRONMENT 8-3 



Site Location and Conditions 8-3 



Bathymetry at Site 8-7 



Water Levels and Currents 8-10 



Hurricane Surge 8-10 



Astronomical Tides 8-17 



Tidal Currents 8-21 



Wave Conditions 8-26 



Waves Generated in Delaware Bay 8-26 



Waves Generated in Ocean 8-37 



PRELIMINARY ISLAND DESIGN 8-63 



Revetment on Seaward Side of Island 8-65 



Selection of Armor Unit Type 8-65 



Quay Wall Caisson on Bay Side of Island 8-93 



Waves in Harbor--Diffraction 8-93 



Wave Forces During Construction 8-95 



Earth Forces 8-102 



LONGSHORE TRANSPORT AT OCEAN CITY, MD 8-107 



Hindcast Wave Data 8-107 



Visual Wave Data 8-122 



BEACH FILL PROBLEM- -OCEAN CITY, MD 8-129 



REFERENCES 8-132 



LIST OF FIGURES 



FIGURE 



5-1 

 5-2 

 5-3 



5-4 

 5-5 



5-6 



5-7 

 5-8 

 5-9 



General Classification of Coastal Engineering Problems . . 5-2 



Effects of Erosion 5-6 



Equal Value Contours of ^i,ox"Ct'ioal ^^ Relative 



Differences between Barrow and Native Textural 



Parameters 5-13 



Stabilized and Migrating Dunes 5-22 



Schematic Diagram of Storm Wave Attack on Beach and 



Dune 5-23 



Types of Littoral Barriers Wliere Sand-Transfer Systems 



have been Employed 5-26 



Illustration of a Typical Groin 5-35 



General Shoreline Configuration for Two or More Groins . . 5-35 



Factors in Determining Beach Width Updrift of a Groin. . . 5-37 



VIII 



