Existing conditions 



Results of wave height tests conducted for existing conditions are presented 

 in Table 4 for test waves from the four test directions and four swl's. For the 

 0.0-m (0.0-ft) swl, maximum wave heights along Camp Ellis Beach 

 (Gages 1-6) were 1.50, 1.28, 0.64, and .006 m (4.9, 4.2, 2.1, and 0.2 ft) for the 

 101 -, 88-, 75-, and 56-deg directions, respectively. Maximum wave heights 

 for the -t-2.7-m (-i-8.8-ft) swl were 2.78, 2.78, 2.48, and 0.8 m (8.9, 8.9, 7.9, 

 and 2.6 ft) along Camp EUis Beach, respectively, for the 101-, 88-, 75-, and 

 56-deg directions. Maximum wave heights along the beach for the +3.7- and 

 -h4.1-m (+12.0- and +13.6-ft) swl's were 2.7 and 3.3 m (8.7 and 10.8 ft), 

 respectively, for test waves from 88 deg. Visual observations during testing 

 revealed reflected waves off the sand-tightened portion of the north breakwater 

 back toward Camp Ellis Beach. 



Wave-induced current patterns and magnitudes for existing conditions are 

 shown in Photos 1-19 for representative waves from all directions and swl's. 

 For all test conditions currents adjacent to the beach moved in a northerly 

 direction. Maximum velocities obtained along the beach were 0.9, 0.94, 0.76, 

 and 0.003 m/s (2.9, 3.1, 2.5, and 0.1 fps) for the 101-, 88-, 75-, and 56-deg 

 directions, respectively. Typical wave patterns obtained for existing conditions 

 also are shown in Photos 1-19. 



General movement of tracer material in the vicinity of Camp Ellis Beach 

 for existing conditions is shown in Photos 20-34. Each photo represents the 

 progression of sediment tracer movement (model time) for the particular test 

 condition shown. For test waves from 101, 88, and 75 deg, sediment tracer 

 material moved northerly for the +2.7-m (+8.8-ft) swl. The more severe waves 

 resulted in material moving out of the area at an increased rate. For extreme 

 storm waves from 88 deg with the +3.7- and +4.1-m (+12.0- and +13.6-ft) 

 swl's, sediment material was washed up on the overbank of the model due to 

 significant runup. In general, tracer material did not move out of the immedi- 

 ate Camp Ellis Beach area for test waves with the 0.0-m (0.0-ft) swl. Also, 

 for test waves from 56 deg with the +2.7-m (+8.8-ft) swl, sediment tracer 

 material remained in the immediate vicinity of Camp Ellis Beach. 



Improvement plans 



Wave height test results obtained for Plan 1 are presented in Table 5 for 

 test waves from the four test directions and four swl's. For the 0.0-m (0.0-ft) 

 swl, maximum wave heights along Camp Ellis Beach (Gages 1-6) were 1.64, 

 1.2, 0.64, and 0.15 m (5.4, 3.9, 2.1, and 0.5 ft) for the 101-, 88-, 75-, and 

 56-deg directions, respectively. Maximum wave heights for the +2.7-m 

 (+8.8-ft) swl were 2.43, 2.7, 2.2, and 0.79 m (8.0, 8.9, 7.2, and 2.6 ft) along 

 Camp Ellis Beach for the 101-, 88-, 75-, and 56-deg directions, respectively. 



24 



Refers to maximum significant wave heights throughout report. 



Chapter 4 Tests and Results 



