Date ________________
Name __________________
Grader
________________
Grade _____________

GLG 411  Problem Set 12
MASS TRANSPORT OF SOLUTES: VISUAL
SOLUTE TRANSPORT
(VST)
PURPOSE:
This week’s problem set will again use
Visual Solute Transport
(VST)
(Thorbjamarson
et al. 2002) to simulate in one dimension solute
transport through a porous media.
This time, however, simulations
will be generated for a fixed distance from the solute source rather
than for variable distances.
PROBLEM:
1)
In last week’s lab you were given a problem concerning an
underground storage tank leaking a solution with a boride
concentration of 500 mg/L.
You were asked to calculate using the
onedimensional equation for hydrodynamic dispersion the
concentration of the boride in mg/L after 24 months at a distance of 20
m from the point where the solution entered the groundwater.
You
were also given the following information:
The solution entered an unconfined aquifer that has a hydraulic
conductivity of 4.0 x 10
3
cm/s and an effective porosity of 2 x 10
1
.
The water table associated with the aquifer has a gradient of .0015 and
a dispersivity of 1.57m; the effective diffusion coefficient for the
solution is estimated to be 1 x 10
9
m
2
/sec.
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 Fall '06
 Larson
 Aquifer, highest concentration, retardation coefficient

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