0.25
0.05
Dissolved (g/mL)
Dissolved (g/mL)
Adsorbed (g/g)
Adsorbed (g/g)
Air-in-pores (g/cm3)
0.20
Air-in-pores (g/cm3)
0.04
0.15
0.03
0.10
0.02
0.05
0.01
0
20
40
60
80
100
0
20
40
60
80
100
Time (yrs)
Time (yrs)
b. Lower soil bulk density input parameter (1.62 com-
a. Using Harding Lawson Associates output file
pared to 1.92 g/cm3).
SSOUT034.OUT.
2.5
0.05
Dissolved (g /mL)
Dissolved (g /mL)
Adsorbed (g /g)
Adsorbed (g /g)
Air-in-pores (g /cm3)
3
Air-in-pores (g /cm )
2.0
0.04
1.5
0.03
1.0
0.02
0.5
0.01
0
20
40
60
80
100
0
20
40
60
80
100
Time (yrs)
Time (yrs)
c. Higher intrinsic permeability input parameter
d. Decreased disconnectedness index input parameter
(1 104 compared to 1 107 cm2).
(6.3 compared to 10).
Figure 1. SESOIL model simulations for benzene concentration vs. time at 5330-cm depth.
tests. The sensitivity of the parameters is de-
peak concentration of benzene. The benzene con-
centration increased (0.12 g/mL) compared to
scribed in terms of change in dissolved maxi-
mum concentration of benzene and time taken to
the Drewett et al. (1993) estimates when the soil
bulk density was lowered from 1.92 to 1.62 g/cm3
reach the maximum benzene concentration at
5330 cm depth compared with original values (Fig.
(Fig. 1b). Furthermore, benzene was released 5
1a). The changes in benzene concentration as ad-
years earlier into the groundwater compared
sorbed and as air-in-pores were similar to dis-
with the Drewett et al. (1993) estimates.
solved concentration.
Intrinsic permeability
SESOIL is highly sensitive to changes in intrin-
Soil bulk density
sic permeability from 1 107 to 1 104 cm2 (Ta-
Soil bulk density had a significant effect on the
6
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