MIKE 21 BW, User Manual, Page: 162 / 196

Reference Manual
162 MIKE 21 BW - © DHI
where E denotes the mean operator. The kurtosis is a higher-order measure
to identify non-Gaussian characteristics of a wave field. For a Gaussian sea
state (i.e. linear and random waves) the kurtosis is 0. Usually you will not
include this quantity in your model output specifications.
Atiltness
The atiltness A is defined by
(5.13)
where E denotes the mean operator. The atiltness is a higher-order integral
measure of the lack of vertical wave profile symmetry. The parameter takes a
positive value when the wave profile are tilted forward (like in the shoaling
zone) and takes a negative value when tilted backward. For further informa-
tion on this output type please see Goda and Morinobu (1998) p. 314ff.
Usually you will not include this quantity in your model output specifications.
A
E
 
t

------
 
 
3  
t

------
 
 
3
–
 
 
E
 
t

------
 
 
2  
t

------
 
 
2
–
 
 
3 2 /
--------------------------------------------------- =