24
Coastal Engineering: Theory and Practice
ond o,
MDæ DS/D^
2 Skewness =------------------------T, . ■
]
(-^16 -D95/-D5 £>84)■L/2
Kurtosis = log---------------------------a9
(2-6)
(2-7)
where, ag is the standard déviation of the log (grain size) distribution of the
sample. It is often found that the distribution of grain sizes is approximately
log normally distribution. If this is the case, the standard déviation of the
log (grain size) distribution is given by
(Tp = log
a^y/2
^15.9/
(2-8)
A study on the bed sédiment characteristics in the vicinity of outer and
inner harbour at the Cochin Port (9°58/10"N, 76°14/22//E) with typical
values is presented. The locations around the outer and inner harbour of
port are depicted in Fig. 2.2.
The bed sédiment characteristics established for a few locations of outer
and inner harbour of Cochin port are tabulated in Table 2.2.
Fig. 2.2 Sédiment sample locations.