Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloIntegrated analysis of sediment source areas in an Alpine basin
Anno di pubblicazione2020
Formato-
Autore/iOss Cazzador D.; Rainato R.; Cavalli M.; Lenzi M.A.; Picco L.
Affiliazioni autoriDepartment of Land, Environment, Agriculture and Forestry, Università degli Studi di Padova, Viale dell'Università 16, Legnaro, PD, 35020, Department of Land, Environment, Agriculture and Forestry, Università degli Studi di Padova, Viale dell'Università 16, 35020 Legnaro, PD, Italy, , Italy; Research Institute for Geo-Hydrological Protection, National Research Council, Corso Stati Uniti, 4, Padova, 35127, Research Institute for Geo-Hydrological Protection, National Research Council, Corso Stati Uniti, 4, 35127 Padova, Italy, , Italy; Universidad Austral de Chile, Institute of Civil Works, Faculty of Engineering, Valdivia, Universidad Austral de Chile, Institute of Civil Works, Faculty of Engineering, Valdivia, Chile, , Chile; Universidad Austral de Chile, RINA - Natural and Anthropogenic Risks Research Center, Valdivia, Universidad Austral de Chile, RINA - Natural and Anthropogenic Risks Research Center, Valdivia, Chile, , Chile
Autori CNR e affiliazioni
  • MARCO CAVALLI
Lingua/e
  • inglese
AbstractIn Alpine environment, studying the evolution of sediment mobility from hillslopes to lower landforms and channel network is a challenging task, mainly due to the complex interplay of erosion and colluvial processes, topographic features and climatic conditions. The combination of direct field surveys and digital terrain models can provide a good opportunity to accurately investigate the sediment delivery processes and improve the understanding of geomorphic sediment cascade. The main aim of this work is to analyze sediment dynamics in sediment source areas of an Alpine basin (Rio Cordon catchment, 5 km), integrating techniques that are usually applied separately: sediment tracing with Passive Integrated Transponders (PITs) and DEM of Difference (DoD). Additionally, the relationship between rainfall characteristics and sediment source behavior was analyzed. Sediment transfer through source areas and the geomorphic evolution of those areas were analyzed by field investigations between October 2017 and September 2018. Specifically, eleven source areas with five different typologies were investigated by installing 268 tracers to analyze sediment mobility along hillslopes. The source areas and the tracers' displacements monitoring was carried out after snowmelt (late May 2018) and periodically during Summer 2018 (July, August and September. To investigate the geomorphic changes in source areas, high-resolution DEMs (0.05 m cell) were derived with a Structure from Motion (SfM) technique in two different periods, after snowmelt in early June 2018 and in the following September; the collection of these data permitted computation of DoDs. To analyze the rainfall characteristics, five rain gauging stations were used. Rainfall analysis revealed that three different events exceeded the threshold of a two-year recurrence interval for different durations, which in turn were considered to be triggering events for each monitored period. The tracers exhibited an interesting mobility rate (37.7%) with different dynamics for source typologies, while geomorphic evolution computed with DoDs showed consistent changes mainly in debris-flow channels and debris-flow deposits. The rainfall intensity resulted as a variable controlling the sediment mobility through the source areas, while the integration of the two methodologies highlighted how mobilized tracers originate mainly from erosional surfaces. The research provides a detailed analysis of hillslope dynamics in the surveyed area, providing increased knowledge regarding the delivery processes that act on sediment sources and better interpretations of sediment mobility in Alpine environments.
Lingua abstractinglese
Altro abstract-
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Pagine da-
Pagine a-
Pagine totali-
RivistaCatena (Cremling.)
Attiva dal 1973
Editore: Elsevier Science - Cremlingen
Paese di pubblicazione: Paesi Bassi
Lingua: inglese
ISSN: 0341-8162
Titolo chiave: Catena (Cremling.)
Titolo proprio: Catena. (Cremling.)
Titolo abbreviato: Catena (Cremling.)
Titoli alternativi:
  • Catena (Amsterdam) (Cremling.)
  • Catena (Giessen) (Cremling.)
Numero volume della rivista188
Fascicolo della rivista-
DOI10.1016/j.catena.2019.104416
Verificato da referee-
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)
  • Scopus (Codice:2-s2.0-85079129079)
Parole chiaveDem of difference, geomorphic evolution, sediment transfer, source areas, tracers
Link (URL, URI)http://www.scopus.com/record/display.url?eid=2-s2.0-85079129079&origin=inward
Titolo parallelo-
Data di accettazione-
Note/Altre informazioni-
Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR
  • DTA.AD003.027.001 : Geomorfometria e dinamiche del sedimento nei bacini montani
Progetti Europei-
Allegati