Table 7 

 Average Shoreline Movement (metres/year) 

 Bull Bay. South Carolina 



Location 



Bull Harbor 

 [15/7 - 15/15 



Anderson Creek - Venning Creek 

 [15/16 - 15/19] 



Venning Creek - Graham Creek 

 [15/20 - 16/2] 



Graham Creek - Harbor River 

 [16/3 - 16/15] 



Harbor River - Bull River 

 [16/16 - 16/20] 



Bull River - Five Fathom Creek 

 [16/21 - 16/26] 







Survey Dates 







1874- 



1875- 



1921- 



1934- 



1962- 



1934 



1921 



1934 



1962 



1983 





-0.1 



-0.8 



-0.5 



-0.5 





(100) 



(100) 



(100) 



(100) 





-2.2 



-2.3 



-1.9 



-0.4 





(83) 



(95) 



(98) 



(100) 





-0.5 



-0.5 



-0.4 



0.1 





(99) 



(99) 



(99) 



(95) 





0.4 



-0.6 



0.1 



-1.4 





(98) 



(98) 



(99) 



(98) 



-0.2 



0.2 



-0.8 



0.1 



-0.9 



(5) 



(95) 



(95) 



(100) 



(73) 





1.3 



1.3 



-0.2 



-0.1 





(97) 



(100) 



(98) 



(98) 



Note: Numbers in parentheses indicate percent shoreline surveyed during the 

 given time interval . Numbers in brackets indicate the maps and segments con- 

 tained in the data block; e.g., Bull River-Five Fathom Creek [16/21 - 16/26] 

 extends from map 16 segment 21 to map 16 segment 26 . 



between 1874 and 1983, erosion dominated over accretion. Undoubtedly, the 

 previously discussed diversion of the Santee River had a role in this. 



95. Standard deviation along this reach varies from less than ±2 m/year 

 up to ±30 m/year (Figure 39) . South Island, which lies downdrift of Winyah 

 Bay, shows extreme variability in shoreline position. A second peak of large 

 standard deviations occurs in association with accretion along the central 

 part of Murphy Island. Within reach 5, the pattern of highest variability in 

 shoreline positions adjacent to inlets is not as apparent. The trend is not 

 evident at all on Murphy Island, where the central section of the island is 

 most variable. North and South Islands and Sand Point Beach do exhibit a more 

 stable central portion with greater deviations toward inlets. The remainder 

 of reach 5 has a vaguely linear trend between inlets. 



81 



