100 

 80 



60 ■ 



o 10 



a> 



1 8.0 



o 



c 

 ~6.0 



o 



> 

 a> 



UJ 



4.0 



h = 78.0-55.0 = 23.0 



approx. 

 approx. 



1st approx 



Final correction = 6.0 -i- 1.5 + 0.6 = 

 Correction to 2d approx. = 1.5 ft 



Correction to 1st approx. = 6 ft 



2.0 



• 1st approx. 

 o 2d approx. 

 o 3d approx. 



6ft 



1,000 2000 



Distance Offshore (ft) 



3J0OO 



Figure 2. Successive approximations to fit exponential curve to 

 profile data (Ocean Beach, San Francisco, California) . 



