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| Titel |
Solid discharge and landslide activity at basin scale |
| VerfasserIn |
F. Ardizzone, F. Guzzetti, C. Iadanza, M. Rossi, D. Spizzichino, A. Trigila |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250068695
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| Zusammenfassung |
| This work presents a preliminary analysis aimed at understanding the relationship between
landslide sediment supply and sediment yield at basin scale in central and southern Italy. A
database of solid discharge measurements regarding 116 gauging stations, located along the
Apennines chain in Italy, has been compiled by investigating the catalogues, named Annali
Idrologici, published by Servizio Idrografico e Mareografico Italiano in the period from 1917
to 1997. The database records several information about the 116 gauging stations, and
especially reports the sediment yield monthly measurements (103 ton) and the catchments
area (km2). These data have been used to calculate the average solid yield and the normalized
solid yield for each station in the observation period. The Italian Landslide Inventory
(Progetto IFFI) has been used to obtained the size of the landslides, in order to
estimate the landslide mobilization rates. The IFFI Project funded by the Italian
Government is realized by ISPRA (Italian National Institute for Environmental
Protection and Research - Geological Survey of Italy) in partnership with the 21
Regions and Self Governing Provinces. 21 of the 116 gauging stations and the related
catchments have been selected on the basis of the length of the solid discharge
observation period and excluding the catchments with dams located upstream the
stations. The landslides inside the selected catchments have been extracted from the
IFFI inventory, calculating the planimetric area of each landslide. Considering both
the shallow and deep landslides, the landslide volume has been estimated using
an empirical power law relation (landslide area vs. volume). The total landslide
volume in the study areas and the average sediment yield measured at the gauging
stations have been compared, analysing the behaviour of the basins which drainage
towards the Tyrrhenian sea and the basins which drainage towards the Adriatic sea. |
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