UNIGE document Scientific Article
previous document  unige:121711  next document
add to browser collection
Title

Debris‐flood reconstruction in a pre‐alpine catchment in Switzerland based on tree‐ring records of coniferous and broadleaved trees

Authors
Schläppy, Romain
Published in Geografiska Annaler: Series A, Physical Geography. 2011, vol. 93, no. 1, p. 1-15
Abstract Past debris‐flood activity on the forested fan of Torrent de la Greffe located in the Swiss Prealps was assessed from growth disturbances in coniferous and broadleaved tree species. The study of 186 tree‐ring sequences sampled from 44 Norway spruce (Picea abies (L.) Karst.) and 55 broadleaved trees from various species affected by past activity and the sampling of an additional 49 trees for the reference chronology allowed the reconstruction of 17 debris‐flood events since AD 1900. The spatial analysis of trees affected during particular events on the geomorphic map helped the identification of five breakout locations in the torrent and affected sectors on the fan. The coupling of tree‐ring analysis of coniferous and broadleaved tree species proved to be a valuable tool for the reconstruction of past events. Debris‐flood frequency in the investigated torrent (0.16 event yr‐1) is considerably lower than the frequencies reconstructed in most other catchments in the Swiss Alps. As material for the entrainment of debris floods is not always readily available, the torrent has to be seen as supply‐limited.
Keywords BroadleavesDebris floodSupply‐limitedSwiss PrealpsTree ring
Identifiers
Full text
Structures
Research group Climatic Change and Climate Impacts
Citation
(ISO format)
SCHNEUWLY-BOLLSCHWEILER, Michelle, STOFFEL, Markus, SCHLÄPPY, Romain. Debris‐flood reconstruction in a pre‐alpine catchment in Switzerland based on tree‐ring records of coniferous and broadleaved trees. In: Geografiska Annaler: Series A, Physical Geography, 2011, vol. 93, n° 1, p. 1-15. doi: 10.1111/j.1468-0459.2011.00001.x https://archive-ouverte.unige.ch/unige:121711

57 hits

0 download

Update

Deposited on : 2019-08-20

Export document
Format :
Citation style :