£ 



I 



-»■ 



200 



400 



DISTANCE, m 



600 



BOO 



PROFILE LtC 188, 127 SURVEYS FROM 20 JAN 81 70 17 DEC 84 



Figure 9. Envelope of all surveys of profile line 188 



referred to Sallenger, Holman, and Birkemeier (1985) and Howd and Birkemeier 

 (1987) for a discussion of the rapid three-dimensional changes that have been 

 observed at the FRF. As an example, Figure 12 shows profiles 58 and 62 for a 

 sequence of days during October 1982. Initially, both profiles show the bar 

 moving offshore. By the 15th, the bar has begun to migrate onshore at line 

 62, but continues to move offshore along line 58. (These two profile lines 

 are separated by less than 100 m. ) 



21 



