FIGURE PAGE 



8-7 Bathystrophic Storm Surge Hydrograph 8-15 



8-8 Bathystrophic Storm Surge Hydrograph - Comparison of 



Peak Surges 8-16 



8-9 Astronomical Tides - Probability Water Level will be 



above a Given Level, Lewes, Delaware 8-20 



8-10 Tidal Current Chart - Maximum Flood at Delaware Bay 



Entrance 8-22 



8-11 Tidal Current Chart - Maximum Ebb at Delaware Bay 



Entrance 8-23 



8-12 Polar Diagram of Tidal Currents at Island Site 8-24 



8-13 Time Variation of Tidal Current Speed at Island Site . . . 8-25 

 8-14 Calculation of Effective Fetch - Island Site at 



Delaware Bay Entrance 8-27 



8-15 Wind Data in the Vicinity of Delaware Bay 8-32 



8-16 Probability Distribution of Maximum Wind Speed - Thorn's 



Fastest Mile Wind 8-34 



8-17 Frequency of Occurrence of Significant Wave Heights for 



Waves Generated in Delaware Bay 8-36 



8-18 Wave and Swell Diagrams for a Location off Delaware Bay 



Entrance 8-39 



8-19 General Shoreline Alignment in Vicinity of Delaware Bay 



for Refraction Analysis 8-40 



8-20 Refraction - Shoaling Coefficients as a Function of 



Wave Direction and Wave Period 8-46 



8-21 Frequency of Occurrence of Significant Wave Heights for 



Waves Generated in Ocean - Transformation by Refraction 



and Shoaling 8-52 



8-22 Mean Bottom Profile from Deep Water to Mouth of 



Delaware Bay 8-55 



8-23 Engineering Data - Tribars 8-70 



8-24 Engineering Data - Tetrapods 8-71 



8-25 Volume of Concrete Required per 100 fe'et of Structure as 



a Function of Tribar Weight, Concrete Unit Weight and 



Structure Slope 8-72 



8-26 Number of Tribars Required per 100 feet of Structure as a 



Function of Tribar Weight, Concrete Unit Weight and 



Structure Slope 8-73 



8-27 Volume of Concrete Required per 100 feet of Structure as 



a Function of Tetrapod Weight, Concrete Unit Weight and 



Structure Slope 8-74 



8-28 Number of Tetrapods Required per 100 feet of Structure as 



a Function of Tetrapod Weight, Concrete Unit Weight and 



Structure Slopes 8-75 



8-29 Volume of First Underlayer per 100 feet of Structure as 



a Function of Tribar Weight, Concrete Unit Weight and 



Structure Slope 8-80 



8-30 Volume of First Underlayer per 100 feet of Structure as 



a Function of Tetrapod Weight, Concrete Unit Weight and 



Structure Slope 8-82 



