98
G. Langergraber et al.
Acknowledgments. A part of this work was carried out within the project
"Evaluation of the substrate clogging processes at vertical-flow constructed
wetlands for wastewater treatment" funded by the Austrian Science Fund (FWF,
project no.: PI4173-BIO).
Notation
Cj
CS.j
D j
h
K(h)
Ks
ks•j
K/
m
N
n
q
R
S
Se
Sj
t
x;{i=I,2)
ex
a(h), a
ar
as
p
~j
11j
Uj.j
f
index i
index}
indexs
index w
concentration of component i in the aqueous phase (mgj.dm- 3 w)
concentration of component i in the source/sink (mgj_dm- 3 w)
effective dispersion coefficient for component i (dm 2 s_h- 1 )
pressure potential (dms)
unsaturated hydraulic conductivity function (dm3w.dm-2s.h-l)
saturated hydraulic conductivity (dm3w.dm-2s.h-l)
empirical coefficient for adsorption isotherm for component i (-)
components of the dimensionless anisotropy tensor KA (-)
empirical coefficient in van Genuchten relationship (-)
total number of components = 12
empirical coefficient in van Genuchten relationship (-)
volumetric flux density (dm 3 w.dm-2s.h-l)
number of processes = 9
reaction term for component i (mgj.dm-\.h- 1 )
zero-order reaction rate for process} in the aqueous phase
(mgj.dm- 3 w.h- 1 )
source/sink term (dm3w.dm-3s.h-l)
effective water content (-)
concentration of component i in the solid phase (mgj.kg,-l)
time (h)
spatial coordinates (dms)
empirical coefficient in van Genuchten relationship (dms-l)
volumetric water content (dm 3 w.dm-3 s)
residual water content (dm 3 w_dm-3 s)
saturated water content (dm 3 w-dm-3 s)
soil bulk density (kg,.dnf3s)
empirical coefficient for adsorption isotherm for component i (-)
empirical coefficient for adsorption isotherm for component i (-)
stoichiometric factor for component i and process} (mgj.mg/)
pore-connectivity parameter (-)
i= l..N
}= l..R
solid
water