GIS-assisted modelling for debris flow hazard assessment based on the events of May 1998 in the area of Sarno, Southern Italy : II. Velocity and dynamic pressure

Auteur(s) et Affiliation(s)

TOYOS, G.

Dept. of Geography, Univ., Cambridge, Royaume-Uni

GUNASEKERA, R.

Willis Research Network (WRN), London, Royaume-Uni

ZANCHETTA, G.

Dip. Scienze della Terra, Pisa, Italie

OPPENHEIMER, C.

Dept. of Geography, Univ., Cambridge, Royaume-Uni

SULPIZIO, R.

CIRISIVU, clo Dip. Geomineralogico, Bari, Italie

FAVALLI, M.

Istituto Nazionale di Geofisica e Vulcanologia (INGV), Pisa, Italie

PARESCHI, M.T.

Istituto Nazionale di Geofisica e Vulcanologia (INGV), Pisa, Italie

Description :
The AA. present here an approach to predict the velocity of debris flows on the basis of the energy line concept. First, they obtained empirically and field-based estimates of debris flow peak discharge, mean velocity at peak discharge and velocity, at channels and within the fans of ten of the debris flow events that occurred in May 1998 in the area of Sarno. The AA. used this data to calibrate regression models that enable the prediction of velocity as a function of the vertical distance between the energy line and the surface. The collected data and resulting empirical models constitute a realistic basis for more complex numerical modelling. In addition, the GIS implementation constitutes a useful decision-support tool for real-time hazard mitigation.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 11, p. 1693-1708, nombre de pages : 16, Références bibliographiques : 2 p.

Date :
2008

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais