Empirical prediction of debris-flow mobility and deposition on fans

Auteur(s) et Affiliation(s)

SCHEIDL, C.

Inst. of Mountain Risk Engineering (IAN), Dep. of Civil Engineering and Natural Hazards, Vienna, Autriche

RICKENMANN, D.

Inst. of Mountain Risk Engineering (IAN), Dep. of Civil Engineering and Natural Hazards, Vienna, Autriche

WSL, Mountain Hydrology and Torrents, Bimensdorf, Suisse

Description :
A data base of documented sediment-transporting events in torrent catchments of Austria, Switzerland and northern Italy has been compiled, using common classification techniques. With this data the AA. test an empirical approach between planimetric deposition area and event volume. They introduce a new empirical relation to determine the mobility coefficient as a function of geomorphologic catchment parameters : mean channel gradient and fan gradient. The empirical equations are implemented in a geographical information system (GIS) based simulation program and combined with a simple flow routing algorithm, to determine the potential runout area covered by debris-flow deposits. The simulation program is tested with debris-flow events of 1987 and 2005 in Switzerland for areas where LiDAR generated digital elevation models (DEMs) are available.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 2, p. 157-173, nombre de pages : 17, Références bibliographiques : 1,5 p.

Date :
2010

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

Langue :
Anglais