MODFLOW Link

SESOIL to MODFLOW/MT3D Link

SEVIEW contains the only link between the SESOIL vadose zone model and MODFLOW/MT3D. This link is versatile enough that it can be used with almost any groundwater transport and fate model with provisions for varying loads.

Groundwater Transport and Fate Model

MODFLOW is a three-dimensional finite-difference groundwater model. It can simulate steady state and transient flow conditions in irregularly shaped aquifers. Individual aquifer layers can be confined, unconfined, or a combination of confined and unconfined. Influence from external stresses, such as flow to wells, areal recharge, evapotranspiration, flow to drains, and flow through river beds, can be simulated. Hydraulic conductivities or transmissivities for any layer may differ spatially and be anisotropic.

Establish Site-Specific Cleanup Objectives

MODFLOW (MT3D or RT3D) can now utilize the time-dependent contaminant release rates from the SESOIL vadose zone model as load to groundwater. Users can establish varying time step lengths. This means that the MODFLOW time step do not need to be set to one month when linked to SESOIL.


Sample SESOIL - MODFLOW Link Data

Time Step
Number

Length
(months)

Length
(days)

Start Time
(days)

End Time
(days)

Groundwater
Recharge

(cm)

Mass
(g)

Concentration
(ppm)

0

0

0

0

0

0.00E+00

0.00E+00

0.00E+00

1

120

3648

0

3648

1.20E+02

0.00E+00

0.00E+00

2

120

3648

3648

7296

1.20E+02

0.00E+00

0.00E+00

3

60

1824

7296

9120

6.00E+01

1.15E+06

2.05E-01

4

60

1824

9120

10944

6.00E+01

1.05E+07

1.88E+00

5

60

1824

10944

12768

6.00E+01

7.30E+06

1.31E+00

6

30

912

12768

13680

2.87E+01

2.03E+06

7.61E-01

7

30

912

13680

14592

3.13E+01

1.40E+06

4.80E-01

8

60

1824

14592

16416

6.00E+01

1.21E+06

2.17E-01

9

60

1824

16416

18240

6.00E+01

3.39E+05

6.08E-02


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