data to determine if there appeared to be any long-term trends, and if 

 so, what they were. The plots of survey volume changes with time com- 

 bined with the older survey data are given in Appendix C. Despite 

 possible weaknesses in the older survey data, several strong trends are 

 clearly apparent. Most of these historical trends coincide with the 

 trends delineated in this VIMS-CERC study. 



Fort Story (profile line 1) has been in a definite accretional trend 

 since Fausak's work in 1969. The foredune area has been especially 

 accretional . 



Unfortunately, a true picture of exactly what has been going on in 

 the Virginia Beach area cannot be concluded from available data; again 

 the influence of artificial beach nourishment masks the true beach 

 processes here. Of the four locations involved [2 to 5), profile line 2 

 is probably the least affected. The erosional influence of the Ash 

 Wednesday, 1962 storm and the slow but steady recovery of the location 

 are clearly reflected in the data. Since that storm, the foredune has 

 built vertically some 3 to 4 meters, and the total sand volume is 

 greater than before the storm. This profile line is located in a 

 residential area, and the residents have taken great pains to plant 

 and protect dune grasses and sea oats. Certainly this planting, com- 

 bined with the downdrift nourishment, has had a major effect on dune 

 recovery and restoration. The remaining Virginia Beach profile lines 

 show slight long-term erosional trends in spite of sand nourishment. 



Profile line 8 is the only Dam Neck location for which there is 

 any long-term data. This location, which has appeared to be experi- 

 encing an accretional -trend (most notably above the high tide line) 

 since the VIMS-CERC study began, appears to be in an erosional (sta- 

 tistically significant) long-term trend. 



In Sandbridge, profile line 10 appears to remain in an almost 

 unchanged (only very slightly accretional) long-term trend since July 

 1969. Surveyed beach volume fluctuations appear to have varied much 

 more widely (i.e., more active) from July 1969 to March 1971, than 

 during the VIMS-CERC study. 



The only Back Bay profile line suggestive of a long-term erosional 

 trend appears to be profile line 15. The remaining profile lines 

 (12, 13, and 14) have tended to be accretional, with profile Ime 14 

 having the most statistically significant trend of all the Back Bay 

 survey locations. 



The three False Cape profile lines (16, 17, and 18) demonstrate 

 long-term accretional trends, with profile line 18 being statistically 

 the most significant. In the foredune areas, some of the pipes 



62 



