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| Titel |
Flood susceptibility assessment in a highly urbanized alluvial fan: the case study of Sala Consilina (southern Italy) |
| VerfasserIn |
N. Santangelo, A. Santo, G. Crescenzo, G. Foscari, V. Liuzza, S. Sciarrotta, V. Scorpio |
| 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 ; 11, no. 10 ; Nr. 11, no. 10 (2011-10-17), S.2765-2780 |
| Datensatznummer |
250009731
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| Publikation (Nr.) |
 copernicus.org/nhess-11-2765-2011.pdf |
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| Zusammenfassung |
This paper deals with the risk assessment to alluvial fan flooding at the
piedmont zone of carbonate massifs of the southern Apennines chain (southern
Italy). These areas are prime spots for urban development and are generally
considered to be safer than the valley floors. As a result, villages and
towns have been built on alluvial fans which, during intense storms, may be
affected by flooding and/or debris flow processes.
The study area is located at the foothills of the Maddalena mountains, an
elongated NW-SE trending ridge which bounds to the east the wide
intermontane basin of Vallo di Diano. The area comprises a wide detrital
talus (bajada) made up by coalescent alluvial fans, ranging in age from the
Middle Pleistocene to the Holocene. Historical analysis was carried out to
ascertain the state of activity of the fans and to identify and map the
zones most hit by past flooding. According to the information gathered, the
Sala Consilina fans would appear prone to debris flows; in the past these
processes have produced extensive damage and loss of life in the urban area.
The watershed basins feeding the fans have very low response times and may
produce debris flow events with high magnitudes. Taking into account the
historical damage, the fan surface morphology, and the present urban
development (street orientation and hydraulic network), the piedmont area was
zoned and various susceptibility classes were detected. These results may
represent a useful tool for studies aiming at territorial hazard mapping and
civil protection interventions. |
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