Kouli_etal_2008_Groundwater modelling_BOOK.pdf - Pantelis ...

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Sabrina Saponaro, Sara Puricelli, Elena Sezenna et al.
air saturation values around P AS , but a certain amount of air flowing through pollution in soil
escapes the collecting system.
A pulsed AS does not seem to be suitable for the site. A variation in the screen position
of the AS wells is not advisable, due to a reduced overlapping of the ZOT AS and pollution in
soil. Surface sealing significantly increases the amplitude of the ZOT SVE of the SVE system. A
possible system upgrade is suggested, composed by 4 AS wells and 4 SVE wells, each
operating as during the full-scale treatment performed up to now by P AS and P SVE , and surface
sealing.
List of Symbols
A empirical constant (-)
B empirical constant (-)
C empirical constant (-)
C S specific heat of the rock (J kg -1 K -1 )
e z unit vector in z direction
F mass (kg m -2 s -1 ) or heat flux (J m -2 s -1 )
f soil porosity (-)
f s safety factor (-)
g gravitational acceleration (m s -2 )
H Henry’s law constant (Pa m -3 mol –1 )
h pressure head (m)
h a air-entry pressure head or bubbling pressure head (m)
k intrinsic permeability of soil (m 2 )
k r relative hydraulic conductivity (-)
k rl0 constant (-)
m empirical coefficient (-)
M mass per volume (kg m -3 ) or energy per volume (J m -3 )
n empirical coefficient (-)
n normal vector on surface element Γ j
P pressure (Pa)
P c capillary pressure (Pa)
P cr minimum value of P c (Pa)
P f overburden pressure (Pa)
P h hydrostatic pressure (Pa)
P i injection pressure (Pa)
P max maximum injection pressure (Pa)
P min minimum injection pressure (Pa)
q Darcy velocity (m s -1 )
Q V airflow rate (m 3 s -1 )
r source or sink (kg m -3 )
R universal gas constant (Pa m 3 mol -1 K -1 )
S saturation (-)
S el effective liquid saturation (-)
S r residual saturation (-)