SCHRIFTENREIHE Institut für Pflanzenernährung und Bodenkunde ...

location (labeled in Fig. 1) for the three soil depths (Fig. 9). On the one hand, this
indicates that, given that accurate weather data and basic soil properties are
available, the HYDRUS-1D model result applied in time-stable location can
match well the measured water content both in TSP and in the whole area at
each sampled date. On the other hand, it can also express well the field water
dynamics monitored in another location. Conversely, our monitoring position can
be viewed as kind of location that can represent the field mean moisture content
(i.e. representative position) since it matches well with measured water content
in TSP. From this aspect, temporal stability is a bridge connected between
representative of monitoring and field mean value. Moreover, the model result
can express field water dynamics in both topsoil and subsoil. This may
circumvent the challenge of representative sites needed for multiple depths
monitoring by a hydraulic model. Therefore, we consider that the temporal
stability concept, linked with a hydraulic model, provides a useful tool for
verifications of hydraulic process.
80
Cumulative infiltration (cm)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
y = 0.0101x 2 + 0.0453x
R 2 = 0.999
0 5 10 15 20
Square root of time (s 1/2 )
Fig. 4.8. Cumulative infiltration and fitting curve for the p72 location in UG 79.