No. Page 



13 Continental shell profiles taken between Virginia Beach, Va., 



and Hatteras Island, N. C, to 30 km from shore 28 



14 Tide ranges, Cape Henry to Cape Hatteras 30 



15 Tide frequencies for ocean shoreline at Kitty Hawk, N. C, for 



several classes of storms: (a) landf ailing, (b) alongshore, 



(c) inland, (d) exiting hurricanes, (e) winter storms, 



(f) all storms 31 



16 Surface wind roses, Cape Henry and vicinity, from data 



collected 1850-1960 33 



17 Surface wind roses, Cape Hatteras and vicinity, from 



data collected 1850-1960 34 



18 Annual cumulative significant wave height distribution based 



on 20 years of hindcast data measured at 10-m water depth 



off Kitty Hawk, N. C 35 



19 Wave rose diagram showing the significant wave height and direc- 



tion of wave propagation for combined 20-year hindcast data in 



10-m water depth at station 81 off Kitty Hawk, N. C 36 



20 Yearly storm surge return period for extratropical storms at 



Hampton Roads, Va 37 



21 Number of tropical cyclones reaching the North Carolina 



coast, by sector, for the period 1886-1970 38 



22 Recreational Pier at Virginia Beach, Va., a typical fishing 



pier for the study area 39 



23 View toward north of groins near Cape Hatteras Lighthouse .... 40 



24 Weir jetty system at Rudee Inlet, Virginia Beach, Va 42 



25 U. S. Geological Survey 1:24,000 quadrangles used as base 



maps in the study 45 



26 Digitization procedure for correcting shoreline position loca- 



tion when original shoreline movement map distortions exist ... 52 



27 Definition sketch illustrating parameters used to obtain 



shoreline change rates for a north-south-trending ocean 



shoreline 56 



28 Ocean shoreline change rates from near Cape Henry to Cape 



Hatteras, from about 1850 to 1980 65 



29 Standard deviation of ocean shoreline position changes between 



Cape Henry and Cape Hatteras 66 



30 Average ocean shoreline change rates for the 36-km-long reach 



south of Cape Henry in the periods 1859-1925 and 1925-1980 ... 67 



31 Average ocean shoreline change rates for two survey periods in 



the reach between Duck, N. C, and Cape Hatteras 68 



