profiles was not constant. However, end effects were minimized by selecting a 

 profile through the center of the dump. Wave characteristics were obtained 

 during the study using Littoral Environment Observation (LEO) techniques. 

 Figure 30 shows an initial profile measured after the dumping was completed 

 (11 August 1976) and measured and calculated profiles at the end of the LEO 

 measurements. The profile response model predicted that there would be little 

 modification in the profile over this time period except for some erosion of 

 the break point bar and filling of the adjacent trough. The measured profile 

 confirms this numerical prediction. Figure 31 shows that the calculated and 

 measured profiles differ at most by a few tenths of a metre in elevation. 

 This difference is undoubtedly within the level of accuracy of the profile 

 measurements. In addition, LEO measurements are not precise means of 

 measuring wave conditions. 



4i- 



2 

 O 

 H 

 < 

 > 



LU o 



-6 



CALCULATED PROFILE 



FINAL MEASURED PROFILE 



INITIAL PROFILE 



40 



80 



120 160 200 240 



OFFSHORE DISTANCE, M 



280 



320 



360 



Figure 30. Comparison of calculated and measured shore-normal 



profiles for New River Inlet, North Carolina 



(dredged disposal sand movement) 



66 



