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| Titel |
Estimating soil suction from electrical resistivity |
| VerfasserIn |
E. Piegari, R. Maio |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 9 ; Nr. 13, no. 9 (2013-09-26), S.2369-2379 |
| Datensatznummer |
250085521
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| Publikation (Nr.) |
 copernicus.org/nhess-13-2369-2013.pdf |
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| Zusammenfassung |
| Soil suction and resistivity strongly depend on the degree of soil saturation
and, therefore, both are used for estimating water content variations. The
main difference between them is that soil suction is measured using
tensiometers, which give point information, while resistivity is obtained by
tomography surveys, which provide distributions of resistivity values in
large volumes, although with less accuracy. In this paper, we have related
soil suction to electrical resistivity with the aim of obtaining information
about soil suction changes in large volumes, and not only for small areas
around soil suction probes. We derived analytical relationships between soil
matric suction and electrical resistivity by combining the empirical laws of
van Genuchten and Archie. The obtained relationships were used to evaluate
maps of soil suction values in different ashy layers originating in the
explosive activity of the Mt Somma-Vesuvius volcano (southern Italy). Our
findings provided a further example of the high potential of geophysical
methods in contributing to more effective monitoring of soil stress
conditions; this is of primary importance in areas where rainfall-induced
landslides occur periodically. |
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