Effect of Scale - Transport and Fate of Chemicals in Soils: Principles and Applications - page 117

10

2a

Time = 2

8

Distance-dependent
Time-dependent

6

4

2

0

0 20 40 60 80 100

10

2b

8

6

Time = 10

Distance-dependent
Time-dependent

4

2

0

0 20 40 60 80 100

10

2c

Time = 20

8

6

4

Distance-dependent
Time-dependent

2

0

0 20 40 60 80 100

Distance (cm)

FIGURE 4.2
Comparison of simulated solute concentration profiles of a pulse tracer based on time-depen-
dent (Equation 4.8) and distance-dependent (Equation 4.16) dispersivity after 2, 10, and 20
hours of transport. Column length L = 100 cm and pulse duration = 16 h.