5/5 Amith R. 5 years ago on Google
Negombo
Lagoon
is
one
of
the
most
productive
estuaries
in
Sri
Lanka.
It
is
12
km
in
length
from
south
to
north
and
3.75
km
at
its
widest
point
(Fig.
1).
The
mean
depth
of
the
lagoon
is
about
1.2
m.
The
greatest
recorded
water
depth
is
2.6
m
but
10%
of
the
lagoon
has
a
water
depth
of
less
than
0.5
m
(Fig.
2).
The
lagoon
covers
an
area
of
approximately
32
km2
and
opens
to
the
sea
at
its
northern
end.
To
the
south,
it
is
connected
to
the
Muthurajawela
marsh
which
covers
an
area
of
approximately
31
km2
and
together
the
lagoon
and
marsh
constitute
a
conjoined,
tidally
influenced
coastal
wetland.
The
main
fresh
water
input
comes
from
the
rivers
Dandugam
Oya
and
Ja-ela
but
the
lagoon
is
characterized
by
a
brackish
water
flora
(seaweeds)
and
some
mangrove
forests
in
the
northern
part.