Wave height tests and wave patterns 



Wave height tests and representative wave patterns for existing conditions 

 and some of the improvement plans (Plans 1 and 6-9) were conducted for test 

 waves from one or more of the selected test directions. Tests involving some 

 test plans, however, were limited to the most critical directions of wave 

 approach (i.e., 101 and 88 deg). Wave gage locations for existing conditions. 

 Plan 1, and Plans 6-9 are shown in Plates 1-2 and 6-8. 



Wave-Induced current patterns and magnitudes 



Wave-induced current patterns and magnitudes were determined at selected 

 locations in the model by timing the progress of an injected dye tracer relative 

 to a graduated scale placed on the model floor. These tests were conducted for 

 existing conditions and selected improvement plans for representative test 

 waves from one or more of the test directions. 



Sediment tracer tests 



Sediment tracer tests were conducted for existing conditions, all improve- 

 ment plans, and historical conditions. Tracer material was introduced along 

 the Camp Ellis Beach shoreline for some conditions. A knovwi amount of 

 tracer material was subjected to identical test conditions for existing conditions 

 and various plans so that test results would have a common base for compari- 

 son, hi other cases (i.e., beach fills, offshore berms, and historical plans), the 

 actual structure or shoal was molded in sediment tracer material. These tests 

 were conducted to determine sediment tracer movement patterns and subse- 

 quent deposits. Some test plans were limited to waves from the most critical 

 incident direction of wave approach (i.e., 101 deg) with respect to erosion of 

 the shoreline. 



Test Results ^' 



In evaluating test results, relative merits of the various improvement plans 

 were based on an analysis of measured wave heights in the Camp Ellis Beach 

 vicinity, the movement of tracer material and subsequent deposits, wave- 

 induced current patterns and magnitudes, and visual observations. Model wave 

 heights (significant wave height or H^) were tabulated to show measured val- 

 ues at selected locations. Wave-induced current patterns and magnitudes were 

 superimposed onto wave pattern photographs for the corresponding conditions 

 tested. General movement of tracer material and subsequent deposits also were 

 documented in photographs. Arrows were superimposed onto photographs to 

 define sediment movement patterns. 



Chapter 4 Tests and Results 



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