Flow Modeling - Environmental Modeling - page 230

The complete code is included in the accompanying software under the name
“richards.m”.
The output for the example data-set is reproduced in Fig. 11.9 . The initial profile
is linear in the major deeper part of the soil column. In the upper 10 cm, the linear
profile is disturbed by a layer with high pressure head and high water content. There
is constant inflow specified as input condition at the top of the column, and a zero
pressure head 2 m below the top, representing the groundwater table.
The simulation shows the gradual development towards a steady state with
constant infiltration and a gradual increase of volumetric water content from 38%
towards its maximum of 52%. Parameters for soil properties were taken from
Hornberger and Wiberg ( 2005 ). The physical units for all data are a combination
from length in [cm] and time in [h].
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