migrated approximately 670 m northwest and was composed of two small islands 

 totaling about 61,000 m 2 in surface area. No evidence of the island appears 

 on the 1964 survey, but in 1970/74, it was at its maximum mapped extent. It 

 trended northwest -southeast, starting at the same point as the island in the 

 1920's. Its long axis was about 2,070 m, and it was about 2.2 x 10 6 m 2 in 

 area. By 1983, it was back to two small, thin, islands, the longest being 

 approximately 600 m with a north-south orientation. Combined surface area was 

 about 43,000 m 2 . The net change from 1920/21 to 1983 has been an increase in 

 surface area of 18,000 m 2 . The banks are probably an exposed portion of the 

 North Edisto River Inlet ebb-tidal delta. Changes outlined here illustrate 

 the dynamic nature of ebb deltas in response to changing environmental 

 conditions . 

 Captain Sams Inlet (Map 10) 



128. The 1854 survey does not indicate any inlet in the shoreline, but 

 by 1921, Captain Sams Inlet was approximately 1,340 m wide, with two small 

 islands between. Since 1921, the northeast side of the inlet has been advanc- 

 ing in alongshore direction southwestward. The northeast side (spit) grew 

 1,150 m between 1921 and 1933 (97 m/year) . Between 1933 and 1964, it grew at 

 only 6 m/year, but this rate increased to approximately 44 m/year between 1964 

 and 1983. Net elongation from 1921 to 1983 was approximately 2,200 m. During 

 this same time, southwest erosion occurred alongshore as the inlet migrated 

 southwest. From 1921 to 1933, erosion on the southwest side was approximately 

 305 m, which was a slower pace than updrift side accretion. As a result, the 

 inlet narrowed. Downdrift erosion and inlet narrowing continued to 1983, when 

 the net result was approximately 1,800 m of southwest erosion and 400 m of 

 narrowing. The inlet was at its narrowest in 1964 and 1970, when it was only 

 about 120 m wide . 



Stono Inlet (Map 11) 



129. Stono Inlet is large with several islands in it, including Bird 

 Key. Kiawah Island, southwest of the Inlet, accreted seaward rapidly between 

 1862/64 and 1921 (1,500 m) adding about 90,000 m 2 /year. From 1921 to 1955, it 

 eroded back slightly (60 m) and broadened. Since 1955, it remained fairly 

 stable, having had a net increase in area of 5.7 x 10 6 m 2 since 1862/64. Sub- 

 aerial shoals seaward of the inlet, present in 1862/64, were not evident on 

 the 1921 survey, having perhaps migrated onto Kiawah Island and contributed to 

 its seaward growth. 



109 



