34 

 32 

 30 

 26 

 26 

 24 

 22 

 20 



I '^ 

 I '6 



o 



u 14 

 12 

 10 

 8 

 6 

 4 

 2 

 

 • 2 



~~l;; Shoreline Position Verticol 

 Ootum is MSL Horironlol 

 Ootum is Base Line 



""^. First Survey ( I Apr. 1970) 

 ^ ^^ Second Survey ( 9 Nov. 1977) 

 \ LINE 

 \- 10 



\ Plot 5 

 V__:,----- 9 



\L 8 



s 



Plot 4 



\L 7 



• 150 -120 -90 -60 -30 



30 60 90 120 150 180 210 

 Distonce (m) 



Figure B-3. Profile comparison for surveys 

 of 10 profile lines at Nauset 

 Beach for survey period, 1970-77. 



b. Spit Migration . From 1856 to 1940, Nauset Inlet opened at the south end 

 of Nauset Harbor. During this period the south spit was either quite short or 

 completely absent (Zeigler, 1960). Since 1940 the south spit has elongated, 

 though there have been several periods of retreat and progression. In October 

 1969, 6 months before the start of the experimental study, the length of the 

 south spit was about 914 meters. By November 1977, the spit had increased to 

 a length of 1,972 meters (Fig. B-4) . Average annual extension of the spit was 

 110 meters (S . Onysko , U.S. Army Engineer Division, New England, personal 

 communication, 1979). 



41 



