Effect of Scale - Transport and Fate of Chemicals in Soils: Principles and Applications - page 119

1.0

0.8

1.25
1.5
1.75
2

0.6

0.4

0.2

0.0

0 1 2 3 4 5 6

Pore Volume

FIGURE 4.3
Comparison of simulated breakthrough curves based on time-dependent dispersivity
(Equation 4.23) with different fractal dimensions D fr .

relatively small compared with the time-dependent counterpart shown in
Figure 4.3.

4.3.1 Transfer Function Models

The CDE is the most commonly used model to describe solute move-
ment through soils where perfect lateral mixing is assumed. Thus, the

1.0

0.8

1.25
1.5
1.75
2

0.6

0.4

0.2

0.0

0 1 2 3 4 5 6

Pore Volume

FIGURE 4.4
Comparison of simulated breakthrough curves based on distance-dependent dispersivity
(Equation 28) with different exponents D fr .