the wave climate than did the scour hole. However, in September Tropical 

 Storm Dean caused rapid erosion of 0.7 m, which was followed by rapid recov- 

 ery. At 323 m, the depth remained relatively stable until September when 1 m 

 of erosion occurred during Tropical Storm Dean. At 433 m, large waves at the 

 end of March caused over 1 m of erosion due to the seaward movement of the 

 offshore bar. Recovery was slow, only 0.25 m, until Tropical Storm Dean 

 eroded the inshore (at 323 m) and reformed an offshore bar near 433 m. 

 Bathymetry 



107. Contour diagrams created from the data obtained during the bathy- 

 metric surveys are presented in Appendix C; characteristics of the bathymetric 

 conditions are discussed below. Figure 44 shows the locations of the profile 

 lines surveyed away from the pier during the monthly bathymetric surveys. 



108. The first survey of the year was performed on 13 and 14 January. 

 The contours away from the pier are relatively straight and shore parallel. 

 However, the trough was symmetric seaward of 350 m and widened to the south 

 between 250 and 350 m, indicating recent wave action from the north. 



109. The next survey, performed on 7 and 8 February, shows small 

 amounts of erosion and accretion on the beach at various locations away from 

 the pier with up to 0.5 m of accretion along the pier out to 450 m. 



110. The survey on 27 and 28 March revealed minor shoaling along the 

 entire surveyed area between 250 and 450 m from shore. The trough was sym- 

 metric along the entire length with up 0.5 m of accretion since the February 

 survey. 



111. Up to 0,75 m of erosion of the nearshore bar was measured during 

 the 4 and 5 May survey. The trough was slightly asymmetric with a steep side 

 to the north and a gently sloping side to the south, indicative of southerly 

 currents. Only minor changes were observed through June. 



112. The 11-12 July survey showed up to 0.5 m of sediment had eroded 

 between 100 and 200 m offshore. A similar amount of deposition occurred from 

 50 to 100 m offshore throughout the survey area. As much as 1.25 ra of accre- 

 tion occurred at the landward end of the pier, creating a large fillet (bulge 

 in the foreshore). The trough narrowed along the seaward-half of the pier due 

 to the deposition of 0.25 m of sediment. 



113. The bathymetry was observed to continue to change from the 8 Au- 

 gust survey. Deposition occurred in a rip channel located 200 ra north of the 

 pier. A prominent area of accretion (+0.25 m) occurred at about msl under the 



69 



