

1 1 1 1 



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WRIGHT MONUMENT 



1 1 II 



1 1 1 



III! 



1 1 1 



12 

























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t^r / 





























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1- 

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 (J 

 111 



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Q 



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RETURN PERIOD. YEARS 



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

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

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

 storms, (f) all storms (from Ho and Tracey 1975) 



surface elevation may cause a reshaping of the beach, nearshore, and inner 

 continental shelf profile; a rising sea relative to land will probably cause 

 the shoreline to retreat. 



42. Sea level change data are not available in the study area. How- 

 ever, tide gage records (Hicks 1981) from Norfolk, Virginia, and Charleston, 

 South Carolina, exist, respectively, for the periods 1928 through 1978 and 

 1922 through 1978. The average rate of sea level rise relative to land at 

 Norfolk was +4.4 mm/year, but the trend may be one of a declining rise rate 

 (Everts 1981); from 1940 to 1978 the average was +3.7 mm/year, or about 

 15 percent less than the 1928 to 1978 average. At Charleston the 1922-to- 

 1978 average was +3.6 mm/year, but Hicks' (1981) data show a 1940-to-1978 

 rate of only +2.5 mm/year and indicate a decline in the rate of sea level 

 rise relative to land. 



31 



