NC0005363_Fig 6-15 One Dimension_20160201

ac 2
c ac
Governing Equation R ac = D axz — v ax
c(x, 0) = Ci
c(0 t) —
foCo 0<t<—to
t > to
ac
ax (00' t) = 0
Ci+(Co —Ci)A(x,t) 0<t <— to
c(x't) _ {Ci + (Co — Ci) A(x, t) — (Co — Ci) A(x, t — to) t > to }
Where:
1 Rx — vt 1vx Rx + vt
A(x, t) _ — er f c 1 + —exp (—) er f c 1
2 2 (DR t) -z_ 2 D 2 (DRt)'
where:
c(x,t) = concentration at a distance x from the source area and a time t
c; = background concentration
co = source concentration
v = groundwater velocity (v=ki/n)
t = time
to = time when source is terminated
x = distance from source
D = dispersion
R = retardation factor
erfc = complementary error function
exp = exponent
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FIGURE 6-15
ONE DIMENSIONAL CONVECTIVE -
DISPERSIVE SOLUTE TRANSPORT WITH
SOURCE TERM AND
SORPTION PROPERTIES