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| Titel |
Characterizing scale-dependent soil mositure series under Eucalyptus globulus using multifractal techniques |
| VerfasserIn |
Antonio Paz-González, Roger Manuel Mestas Valero, Rômulo Guimaraes Giácomo, Elza da Silva Militão |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250057216
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| Zusammenfassung |
| The objective of this study was to determine if soil moisture data recorded at 60-minute
intervals for various soil depth display scale dependent characteristics. Moisture data were
measured on a Eucalyptus globulus plantation at 10, 20, 40, 60, 90 and 140 cm depth under
Atlantic climate during 2010. The water content of the soil profile was above field capacity
most of the winter months, whereas in summer the uppermost layers were below wilting
point. Moreover, soil water was withdrawal until 140 cm depth in the dry season. These
time series of soil water content were analyzed using multifractal formalism. The
distribution of the measure could be considered as a fractal, since the moments obeyed
power lows. A comparison of the moment scaling function Ïgq) for each depth
and month and the scale function of the simulated monofractal type distribution
was carried out. Subsequently, a multifractality index was obtained and the scaling
properties observed were characterized as monfractal or multifractal, depending on the
period of the year assessed and the depth of measurement. In general the degree of
heterogeneity increased from bottom to topsoil and from winter months to summer months. |
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