SANDY HOOK CRITICAL ZONE 
CALIBRATION: K,=0-80 Ko=0.10 Dc=6.0 M 
MEASURED 1971 
MEASURED I S98:2)05 = === = 
CALCULATED 1982  ...cceccceee 
SHORELINE POSITION Y (m) 
100 
t) soo 1000 1500 2000 2500 3000 
LONGSHORE DISTANCE (m) 
Figure 17. Results of calibration 1971-1982 
(maximum constant depth of closure) 
the same time interval. It should be noted that a value of K, = 0.80 is 
close to the empirical design value of 0.77 given for the CERC formula in the 
SPM (Chapter 4, p 4-96). 
Verification 
117. Verification was performed using the measured shorelines for 1932 
and 1953. Simulation of shoreline change for this 21-year time period was 
accomplished in order to provide independent confirmation of the calibration. 
Transport parameters K, and Ky were determined in the calibration with the 
three aforementioned procedures for specifying the depth of closure. 
118. The three resultant simulated 1953 shoreline positions were then 
visually compared to the measured 1953 shoreline position and the acceptabil- 
ity of fit indicator Ydiff calculated for each case. Figures 18 and 19 show 
results obtained for a varying depth of closure and maximum depth of closure, 
respectively. A minimum Ydiff of 919 m was found between the measured and 
simulated shorelines for a variable depth of closure. The result using a 
constant maximum depth of closure was about 10 percent higher. 
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