5406RS0001 



LUEDER, DONALD R., ROCKWELL, W. H., and BELCHER, DONALD J., "Determination 



of Beach Conditions by Means of Aerial Photographic Interpretation," Relations 



Between Beach Features and Beach Conditions, Technical Report No. 6, Vol. 1, School 



of Civil Engineering, Cornell University, Ithaca, N.Y., June 1954. 



Keywords: Aerial Photographs, Coastlines, Coastal Processes 



Report is one of a series describing the results of a research program conducted for the 

 Office of Naval Research to develop techniques for determining beach trafficabiMty from 

 photos. Since trafficability is related to other characteristics, the material presented may be 

 useful in determining from photos beach characteristics useful in coastal engineering. 

 Characteristics such as average foreshore slope, grain size of beach material, beach width, 

 and presence of ripple marks and beach cusps were found related to beach trafficability. The 

 report concludes that good quality, large-scale photos are necessary to accurately measure 

 beach characteristics. Although the median grain size of beach material cannot be 

 determined directly from photos, the report indicates that it can be estimated from beach 

 slope and width. 



5406RS0002 

 LUEDER, DONALD R., and BELCHER, DONALD J., "Determination of Beach Condi- 

 tions by Means of Aerial Photographic Interpretation," Photographic Gray Tones as an 

 Indication of the Size of Beach Materials, Technical Report No. 6, Vol. 4, School of Civil 

 Engineering, Cornell University, Ithaca, N.Y., June 1954. 



Keywords: Aerial Photographs, Coastlines, Soil Identification 



Report is one of a series that describe results of a research program conducted for the Office 

 of Naval Research to develop techniques for determining beach trafficability from photos. 

 Report discusses the use of photo gray tones to determine grain size of beach materials, a 

 technique that may be useful in coastal engineering. The technique measures photo density 

 with a microdensitometer along a line perpendicular to the waterline. Variation in gray tone 

 or photo density along the line is related to the moisture content of beach material wliich is 

 a function of the predominant grain size. Tonal characteristics of the boundary between the 

 gray tone of the dry backshore and the gray tone of the periodically wetted foreshore is a 

 key factor in determining the grain size. Characteristic gray tone patterns for beaches 

 composed of fine and coarse sands are described. This report may be useful in locating the 

 high water line on photos for beach erosion studies. 



5406RS0003 

 LUEDER, DONALD R., and BELCHER, DONALD J., "Determination of Beach Condi- 

 tions by Means of Aerial Photographic Interpretation," A Method for Estimating Beach 

 Trafficability from Aerial Photographs, Technical Report No. 6, Vol. 5, School of Civil 

 Engineering, Cornell University, Ithaca, N.Y., June 1954. 



Keywords: Aerial Photographs, Coastlines, Coastal Processes 



Report is one of a series describing the results of a research program conducted for the 

 Office of Naval Research to develop techniques for determining beach trafficability from 



