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| Titel |
Correlation scaling properties between soil moisture and vegetation indices |
| VerfasserIn |
C. Alonso, A. M. Tarquis, R. M. Benito, I. Zuñiga |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250031487
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| Zusammenfassung |
| The distribution and crop phenology are largely associated with climate, terrain
characteristics and human activity. Remote sensing data provide the opportunity to monitor
crop dynamics and its changes. The images of earth surface obtained by satellites with a high
resolution give huge information on these being the main characteristic of these images a
high local variability in their digital values. Traditional segmentation techniques for
image analysis are many times non useful when such complexity is found in the
images.
The images of Guadalajara (Central Spain), which correspond to an area of 250x250 km,
have been studied. Normalized difference of vegetation index (NDVI) and soil humidity
(NDSI) values which had been extracted with a resolution of 512x512 pixels for this area at
March and June of 2006 were analyzed using multifractal analysis (MFA). The MFA gives a
new representation of two images at different times, which allows the analysis of the
vegetation scenario using different parameters from the multifractal spectrum. The scaling
properties of the correlation between soil humidity and vegetation index at two
different moments are discussed and compared. This approach could be a powerful
way to monitor various dynamic parameters of the vegetation in Central Spain. |
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