Geoscience Reference
In-Depth Information
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PROBLEMS
9.1
Suppose that an approximate (but sufficiently accurate) solution of the Richards equation (9.1),
describing infiltration into an initially dry soil, with a thin layer of water ponded at the surface, can
be written as follows:
z
=
2
.
87 (1
−
S
9
)
t
1
/
2
+
0
.
04 (1
−
S
20
)
t
. The variable
S
=
θ/θ
0
is the degree
of saturation,
z
is the depth into the soil in cm,
t
is the time in min and
θ
0
is the water content at
