Site 



Location 



1 



Wrightsville Beach 



2 



Masonboro Inlet 



3 



Masonboro Beach 



4 



Carolina Beach Inlet 



5 



Carolina Beach 



In addition to being sites of active research projects of CERC, sites 

 1, 2, and 5 are either Federally sponsored beach erosion control and 

 hurricane protection projects or Federally maintained navigation projects. 



The Carolina Beach Inlet studies are being pursued to establish the 

 feasibility of controlling a navigation channel through an inlet by 

 dredging a deposition basin in the throat of the inlet without construc- 

 ting permanent navigation structures such as breakwaters or jetties. The 

 Masonboro Inlet study seeks to substantiate the feasibility of a new con- 

 cept in jetty design, the weir jetty, which involves the provision of a 

 deposition area in the lee of the jetty for the storage of naturally 

 moved littoral materials, and periodic bypassing of these materials by 

 ordinary dredging equipment while providing navigation protection. Both 

 Wrightsville and Carolina Beaches are Federally sponsored hurricane and 

 shore protection projects constructed by the U.S. Army, Corps of Engineers. 

 Data collected on these beaches are being analyzed to determine the budget 

 of the littoral materials and to monitor the condition of the projects 

 built by the Corps of Engineers. Masonboro Beach, at present an 

 undeveloped barrier island between the two inlets, is being studied 

 because of its integral relationship to the barrier island-tidal inlet 

 complex and its contribution to the littoral budget. 



The results of this report will provide additional information for 

 CERC's larger effort in applying remote sensing techniques to under- 

 standing coastal engineering problems. Moreover, it is anticipated that 

 the results presented here will provide a significant input to the con- 

 current CERC projects listed above. 



III. CHARACTERISTICS OF IMAGERY 



The imagery used in this study was ERTS-1 multispectral scanner (MSS) 

 imagery in four discrete spectral bands, ranging in wavelength from 0.5 

 micrometer (green) to 1.1 micrometers (infrared), and conventional aerial 

 photography taken on black and white, color, and infrared color film. 



Specific information concerning the ERTS-1 satellite and details of 

 collection, processing, and dissemination of imagery are contained in the 

 Data Users Handbook (National Aeronautics and Space Administration, 1971); 

 however, for this study it is important to list the radiation wavelengths 

 to understand what is actually portrayed in the imagery of the MSS and the 

 conventional photography. Wavelength ranges for each MSS spectral band 



