tg
ui
da
n
ce
fo
rt
ra
ns
bo
un
da
ry
w
at
er
s,
pr
ep
ar
ed
an
d
P. van der Keur et al.
(floo
dmanag
ement
)an
d
wat
er
qualit
y
ag
re
ed
u
po
n
in
co
m
m
o
n
u
n
de
rs
ta
nd
in
g,
creat
ed
th
e
bas
is
fo
rth
e
formul
atio
n
o
f
joi
nt
m
ea
su
re
s
(Fr
ijte
rs
an
d
Le
en
tv
aa
r
200
3)
Mo
del
s
(na
tural
,te
chnica
l
an
d
so
ci
al
sy
ste
m
s):
Uncert
aint
y
ha
s
to
be
incorp
orated
:
1:
Ep
ist
/media/loftslag/VanderKeur_etal-2008-Uncertainty_IWRM-WARM.pdf