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| Titel |
Spatial models for monitoring the spatio-temporal evolution of ashes after fire – a case study of a burnt grassland in Lithuania |
| VerfasserIn |
P. Pereira, A. Cerda, X. Ubeda, J. Mataix-Solera, D. Martin, A. Jordan, M. Burguet |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 4, no. 1 ; Nr. 4, no. 1 (2013-05-08), S.153-165 |
| Datensatznummer |
250017769
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| Publikation (Nr.) |
 copernicus.org/se-4-153-2013.pdf |
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| Zusammenfassung |
| Ash thickness is a key variable in the protection of soil against erosion
agents after planned and unplanned fires. Ash thickness measurements were
conducted along two transects (flat and sloping areas) following a grided
experimental design. In order to interpolate data with accuracy and identify
the techniques with the least bias, several interpolation methods were tested
in the grided plot. Overall, the fire had a low severity. However, the fire
significantly reduced the ground cover, especially on sloping areas, owing to
the higher fire severity and/or less biomass previous to the fire. Ash
thickness depended on fire severity and was thin where fire severity was
higher and thicker in lower fire severity sites. The ash thickness decreased
with time after the fire. Between 4 and 16 days after the fire, ash was
transported by wind. The greatest reduction took place between 16 and 34 days
after the fire as a result of rainfall, and was more efficient where fire
severity was higher. Between 34 and 45 days after the fire, no significant
differences in ash thickness were identified among ash colours and only
traces of the ash layer remained. The omni-directional experimental
variograms showed that variable structure did not change significantly with
time. The ash spatial variability increased with time, particularly on the
slope, as a result of water erosion. |
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