Table 7 

 Modified Average Wave Height Because of 





Shadowing bv 



Lorain Harbor 







Original 



Modified 





Wave 



H 



H' 





Direction 



ft 



ft 



H'/H 



NNE 



2.53 



1.24 



0.49 



N 



2.41 



1.78 



0.74 



NNW 



2.64 



2.37 



0.90 



CALM 



1.00 



0.90 



0.90 



NW 



3.03 



2.92 



0.97 



WNW 



3.31 



3.27 



0.99 



W 



3.27 



3.26 



0.99 



All 



1.49 



1.29 



0.87 



Calibration and Verification 



390. The calibration and verification process in a design situation 

 requires a large number of simulations. Values of the calibration parameters 

 Kl and K2 are varied to obtain agreement between measured and calculated 

 shoreline change over a known time interval as well as to produce realistic 

 estimates of longshore sand transport rates. Initial estimates of some other 

 parameters may also need to be altered. 



391. In the course of calibration for Lakeview Park, usually only one 

 parameter at a time was changed in order to isolate its effect and understand 

 its role in the overall balance with other parameters. The strategy was to 

 first determine values of main parameters controlling known quantities, in 

 this case the net transport rate and volumetric change inside the study area. 

 These parameter values were determined at the first stage of calibration, and 

 parameters having mainly local and more minor influence were then used to 

 optimize the calibration at the final stage. 



392. For the present case, the value of the primary calibration 

 parameter Kl was varied first until calculated overall net transport rates 

 were close to the previously determined values. Second, the parameter K2 



166 



