Document

Report
Chapelle et al. 2003
MNA
NAS (Natural Attenuation Software)
http://www.nas.cee.vt.edu/index.php
Centerline analysis
Centerline analysis – assume no transverse dispersion:
 2c
 2c
 2c
c
c
Dx 2  Dy 2  Dz 2  v
 Rc  R
x
t
x
y
z
Concept of the steady state plume
IN = OUT
Under what conditions is this plume at steady state?
At steady state:
 2c
c
c
Dx 2  v
 Rc  R
x
t
x
R= 3
R= 6
R= 10
At large times,
value of R is unimportant.
k=
NAC =

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