72-16 Environmental
of strategies based on spot water sampling that were developed for monitoring freshwater. New strategies
ar
e
ne
eded,
an
d
al
though
th
e
ta
sk
is da
unting,
so
me
pr
ogress
ha
s
be
en
in de
veloping
me
thods
th
at
ca
n
co
llect
in
formation
in
situ
. A nu
mber
of se
nsors
fo
r
su
bstances
su
ch
as ni
trates
an
d
ch
lorophyll
ar
e
av
ailable
co
mmercially
fr
om
a nu
mber
of co
mpanies,
bu
t
pr
ogress
ha
s
be
en
sl
ower
fo
r
po
llutants
su
ch
as he
avy
me
tals,
ma
ny
or
ganic
co
mpounds,
an
d
pa
thogenic
ag
ents
. Ne
w
co
mpounds
of in
terest
wi
ll
al
so
ev
olve,
su
ch
as th
e
un
derwater
de
tection
of ex
plosives
an
d
th
eir
sig
natures
in re
lation
to sa
fety
an
d
se
curity
i
ssues
(
Dock
e
tal
. 2
010)
.
Many deployment devices (including Argo oats, AUVs, landers, and SmartBuoys) and associate ...