Forty years of rockfall accumulation at the Mount Wilcox site, Jasper National Park, Alberta, Canada

Modelling of high-mountain relief

Auteur(s) et Affiliation(s)



Description :
Rockfall accumulation was measured in 1981 and 2000 along ca. 850 m of the former Banff-Jasper highway that skirts a large talus cone from Mount Wilcox in Jasper National Park, Alberta. Approximately 34.5 m3 of rockfall debris has accumulated on the roadbed since it was abandoned in 1961. Over the observation period, approximately 10 rockfalls > 0.25 m were deposited on the road each year, but only one every two years was > 0.5 m. Much larger rockfalls (up to 6-10 m3) have traveled across the road, creating bumpholes, and been deposited on the outwash. These results indicate some of the problems with trying to estimate rates of contemporary rockfall activity from sampling programmes based on relatively short periods of time and limited depositional areas because of the magnitude frequency distribution of the rockfall events.


Type de document :
Article de monographie

Source :
Geographia polonica, issn : 0016-7282, 2008, vol. 81, n°. 1, p. 79-91, nombre de pages : 13, Références bibliographiques : 12 ref.

Date :
2008

Editeur :
Pays édition : Pologne, Warszawa, Państwowe Wydawnictwo Naukowe