MIKE 21 BW - Page 162

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
–


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