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| Titel |
Andic soils and catastrophic mudflows in Italy: hydro-pedological cause-effect evidences |
| VerfasserIn |
M. Iamarino, R. De Mascellis, A. Basile, P. Moretti, F. Terribile |
| 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 |
250026310
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| Zusammenfassung |
| Mudflows are between the major catastrophic types of landslides occurring in Italy especially
in terms of victims and damages.
An integrated pedological and hydrological analysis has been performed in Calabria,
Campania, Toscana and Lombardia regions on the detachment crowns of some of the most
important catastrophic mudflows occurred in Italy in the last decades, including the slides of
Sarno (1998), Salerno (1910, 1924, 1954), Platì (1951), Versilia (1996) and Albaredo (1987,
2002) sites.
A detailed hydro-pedological study performed in the Campania region, using
a 2D Richard’s based water balance simulation model, addressed the following
issues: (i) the importance of hydrological properties of andic soils, namely soils
having large quantities of poorly ordered clay minerals; (ii) the interruption of the
pedological continuity of the slope and (iii) the relationship with slope aspect. The main
results show an increase in soil water storage (more than 30%) in both North facing
landscapes and in slope having an interruption in pedo-continuity with respect to some
references.
Overall the results at national scale revealed an evident association between the
investigated catastrophic mudflows and the presence of andic soils, both in the detachment
crowns and on the slopes. We believe that these soils because of the unique hydrological
properties and high tixotropy induced high vulnerability in landslide triggering and
development mechanisms. |
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