SANDY HOOK CRITICAL ZONE 
CALIBRATION: K,=0.41 K2=0.10 Do=VARIABLE 
MEASURED 1971 
MEASUREDEIS8i2i 22 =a == 
CAECUEATIE DUNS B20 icccccicelslsle 
450 aa 
SEAWALL 
350 
300 
Sees SS ewovweveuecucccc ces ueeutS 
SHORELINE POSITION Y (m) 
x 
o 
ee cae owe es 
. oO soo 1000 1s00 2000 
LONGSHORE DISTANCE (m) 
Figure 16. Results of calibration 1971-1982 
(variable depth of closure) 
measured and simulated 1982 shorelines was 591 m. In the case of a constant 
depth of closure of 6.0 m, the position of the 1982 shoreline was optimally 
reproduced with K, = 0.80 and K, = 0.10 , and the difference indicator was 
575m. 
115. A plot of the measured 1971 and 1982 shorelines, and the simulated 
1982 shoreline calculated with a constant maximum closure depth, is shown in 
Calculated 1982 shorelines shown in Figures 16 and 17 both show an 
This result 
Figure 17. 
acceptable visual fit to the measured 1982 shoreline position. 
indicates that use of either a variable or constant maximum depth of closure 
will provide a calibrated model for estimating shoreline change in the project 
area, 
116. Although the calibration procedure reproduced the 1982 measured 
shoreline successfully under both conditions, the longshore sediment transport 
rate predicted by the two calibrations differs by a factor of about 2. Since 
the optimal K, transport parameter changes from 0.41 to 0.80, the transport 
rate will increase by the same multiplier to replicate shoreline change over 
59 
