Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloClustering sediment connectivity maps to distinguish hillslope processes
Anno di pubblicazione2017
Formato
  • Elettronico
  • Cartaceo
Autore/iCrema, Stefano; Bossi, Giulia
Affiliazioni autoriNational Research Council, Research Institute for Geo-Hydrological Protection
Autori CNR e affiliazioni
  • STEFANO CREMA
  • GIULIA BOSSI
Lingua/e
  • inglese
AbstractThe availability of increasingly higher resolution Digital Terrain Models (DTMs) allows to perform a detailed characterization of the morphological features on selected areas of interest. There is a growing interest, within the scientific community, for automatic DTM-based procedures to extract geomorphological features or to model surface processes. Among these, the Index of sediment Connectivity (IC), which estimates the degree of linkage that controls sediment fluxes throughout landscape, and, in particular, between sediment sources and downstream areas, has proved to be a powerful morphometric tool. In particular, IC may be used to better portray and highlight sediment dynamics and pathways at catchment scale. In this work, we compare IC maps for two alpine areas. The first area is a typical debris-flow catchment, while the second area is characterized by the presence of a large deep-seated gravitational slope deformation. Two types of numerical analysis are presented: i) the aggregation and normalization of the IC values and ii) cluster analysis. Our preliminary results show that the spatial information, which is maintained in the cluster analysis and lost in the aggregate procedure, is extremely valuable for the identification and the clustering of areas that are affected by the same predominant geomorphological process.
Lingua abstractinglese
Altro abstractThe availability of increasingly higher resolution Digital Terrain Models (DTMs) allows to perform a detailed characterization of the morphological features on selected areas of interest. There is a growing interest, within the scientific community, for automatic DTM-based procedures to extract geomorphological features or to model surface processes. Among these, the Index of sediment Connectivity (IC), which estimates the degree of linkage that controls sediment fluxes throughout landscape, and, in particular, between sediment sources and downstream areas, has proved to be a powerful morphometric tool. In particular, IC may be used to better portray and highlight sediment dynamics and pathways at catchment scale. In this work, we compare IC maps for two alpine areas. The first area is a typical debris-flow catchment, while the second area is characterized by the presence of a large deep-seated gravitational slope deformation. Two types of numerical analysis are presented: i) the aggregation and normalization of the IC values and ii) cluster analysis. Our preliminary results show that the spatial information, which is maintained in the cluster analysis and lost in the aggregate procedure, is extremely valuable for the identification and the clustering of areas that are affected by the same predominant geomorphological process
Lingua altro abstract-
Pagine da23
Pagine a26
Pagine totali4
RivistaRendiconti online Società Geologica Italiana
Attiva dal 2008
Editore: Società Geologica Italiana - Roma
Paese di pubblicazione: Italia
Lingua: multilingue
ISSN: 2035-8008
Titolo chiave: Rendiconti online Società Geologica Italiana
Titolo proprio: Rendiconti online Società Geologica Italiana.
Titolo abbreviato: Rendiconti online Soc. Geol. Ital.
Titoli alternativi:
  • Rendiconti online SGI
  • Rendiconti online SGI, note brevi
  • Rendiconti online della Società Geologica Italiana
Numero volume della rivista42
Fascicolo della rivista-
DOI10.3301/ROL.2017.05
Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)
  • ISI Web of Science (WOS) (Codice:000400444700005)
Parole chiaveSediment connectivity, hillslope processes, clustering, k-means, landslide, DGSD, debris flow
Link (URL, URI)-
Titolo parallelo-
Licenza-
Scadenza embargo-
Data di accettazione-
Note/Altre informazioni-
Strutture CNR
  • IRPI — Istituto di ricerca per la protezione idrogeologica
Moduli/Attività/Sottoprogetti CNR
  • DTA.AD003.216.001 : FRANE - Monitoraggio e modellazione per la valutazione della pericolosità da frana e la gestione del rischio
Progetti Europei-
Allegati