The
p oject
showed
how
a
u ba
wate way
could
be
desig ed
to
se ve
seve al
fu ctio s
at
o ce.
(Pictu es:
La dazi e)
I
2012,
Si gapo e
tu ed
a
majo
u ba
d ai age
cha el
i to
atu al-like
ive .
The
p oject
was
pa t
of
Si gapo e’s
Active,
Beautiful,
Clea
(ABC)
Wate s
P og amme.Acco di g
to
Wate
O li e,
a
2.7-km
sectio
of
the
Kalla g
Rive
at
Bisha -A g
Mo
Kio
Pa k
was
t a sfo med
i to
a
3-km
wi di g
wate way,
with
la dscaped
ba ks,
pla ts
a d
a
flood
plai .The
wo k
was
ca ied
out
betwee
2009
a d
2011.
I stead
of
keepi g
the
ive
a
st aight
co c ete
ca al,
mea de i g
shape
was
i t oduced.
Pla ts,
ocks,
atu al
mate ials
a d
civil
e gi ee i g
methods
we e
also
used
to
softe
its
edges.
The
aim
was
ot
o ly
to
cha ge
how
the
wate way
looked
but
also
to
imp ove
its
ecological
co ditio
a d
ma age
sto m
wate .As
a
esult,
the
ive
c eated
space
fo
pla ts
a d
a imals.
A
2012
p oject
a ou ceme t
said
the
ew
ive
had
eco ded
a
30%
i c ease
i
biodive sity
eve
befo e
co st uctio
was
completed.
Late
esea ch
published
i
Ecological
E gi ee i g
studied
the
wate way
i
detail
a d
fou d
that
the
ehabilitated
sectio
had
mo e
fish
species
a d
a
highe
sha e
of
ative
fish
tha
a
u t eated
ca al
sectio
dow st eam.The
study
looked
at
the
Kalla g
Rive
at
Bisha -A g
Mo
Kio
Pa k
seve al
yea s
afte
the
ehabilitatio .
Resea che s
compa ed
the
fish
commu ity
the e
with
a
u ehabilitated
sectio
of
the
Kalla g
Ca al.
Thei
fi di gs
showed
that
the
ew
ive
had
also
developed
a
diffe e t
a d
mo e
va ied
fish
commu ity,
although
o – ative
fish
still
emai ed
domi a t.
F om
ca al
to
ive
The
Kalla g
Rive
sectio
at
Bisha -A g
Mo
Kio
Pa k
had
o igi ally
bee
built
as
a
co c ete
ca al.
It
was
pa t
of
Si gapo e’s
la ge
etwo k
of
d ai s
a d
ca als
used
to
ma age
sto m
wate
i
a
highly
u ba ised
e vi o me t.Betwee
2009
a d
2011,
the
2.7-km
ca al
was
ehabilitated
a d
atu alised.
It
became
a
3-km
mea de i g
ive
with
a
flood
plai .The
ive
ba ks
we e
cha ged
usi g
a
combi atio
of
pla ts,
atu al
mate ials
a d
civil
e gi ee i g
tech iques.
The
p oject
also
used
soil
bioe gi ee i g
to
help
stabilise
the
ba ks.
It
used
vegetatio
a d
othe
atu al
mate ials
alo g
with
e gi ee i g
methods
to
hold
soil
i
place
a d
educe
e osio .The
desig
was
also
mea t
to
cope
with
heavy
ai fall.
Du i g
a
majo
dow pou ,
wate
ca
sp ead
ac oss
the
flood
plai
athe
tha
bei g
co fi ed
to
a
a ow
cha el.
The
wide
a ea
a d
vegetatio
c eate
f ictio ,
which
slows
the
moveme t
of
wate
a d
helps
educe
the
p essu e
o
the
ive
fa the
dow st eam.Thus
the
pa k
could
se ve
mo e
tha
o e
pu pose-
p ovide
ope
space
fo
ec eatio
du i g
o mal
co ditio s
while
also
acti g
as
a
flood
plai
whe
la ge
amou ts
of
ai wate
e te ed
the
system.
The
ehabilitated
wate way
suppo ted
mo e
fish
species
a d
a
highe
pe ce tage
of
ative
species.
Fish
populatio
i c ease
The
late
scie tific
study
exami ed
whethe
the
ehabilitatio
had
actually
cha ged
the
aquatic
commu ity.
Resea che s
su veyed
fish
a d
e vi o me tal
co ditio s
i
the
ehabilitated
sectio
betwee
2016
a d
2018.Acco di g
to
Scie ce
Di ect,
they
eco ded
8,325
i dividual
fish
belo gi g
to
26
species
i
the
ehabilitated
wate way.
Th ee
of
those
species
we e
ative
to
Si gapo e.
I
compa iso ,
the
u ehabilitated
Kalla g
Ca al
had
eight
o – ative
fish
species
eco ded,
with
o
ative
species
fou d
i
the
su vey
data
cited
by
the
esea che s.Also,
fish
species
ich ess
was
sig ifica tly
highe
i
the
ehabilitated
sectio .
The
pe ce tage
of
ative
fish
was
also
sig ifica tly
highe
the e
tha
i
the
u ehabilitated
ca al.Howeve ,
the
ehabilitatio
did
ot
esult
i
a
wate way
domi ated
by
ative
fish.
The
fish
commu ity
was
still
mai ly
made
up
of
o – ative
species.Two
o – ative
g oups
we e
pa ticula ly
commo
i
the
ehabilitated
ive .
Quetzal
cichlid
accou ted
fo
68%
of
the
fish
eco ded,
while
tilapia
accou ted
fo
17%.
A
bette
habitat
The
esea che s
li k
the
diffe e ce
pa tly
to
the
g eate
va iety
of
habitats
c eated
by
the
ehabilitatio .
The
old
co c ete
ca al
offe ed
a
much
simple
e vi o me t,
while
the
ehabilitated
ive
had
mo e
complex
physical
featu es.The
p oject
added
pla ts
a d
atu al
mate ials
a d
cha ged
the
st aight
ca al
i to
a
wi di g
ive .
These
cha ges
c eated
spaces
withi
the
wate way
that
could
be
used
by
aquatic
o ga isms.The e
we e
also
diffe e ces
i
e vi o me tal
co ditio s
betwee
the
ehabilitated
a d
u ehabilitated
sectio s.
The
fish
commu ity
i
the
ehabilitated
ive
was
mo e
simila
to
that
of
the
upst eam
ese voi
tha
to
ea by
atu al
fo est
st eams.This
was
impo ta t
because
the
ehabilitatio
did
ot
simply
ec eate
a
atu al
fo est
st eam.
I stead,
it
c eated
a
ew
type
of
u ba
f eshwate
e vi o me t
with
its
ow
combi atio
of
physical
co ditio s
a d
aquatic
species.
