In: Global and Planetary Change, 2008, vol. 60, no. 3-4, p. 222-234
Debris-flow activity on the forested cone of the Ritigraben torrent (Valais, Swiss Alps) was assessed from growth disturbances in century-old trees, providing an unusually complete record of past events and deposition of material. The study of 2246 tree-ring sequences sampled from 1102 Larix decidua Mill., Picea abies (L.) Karst. and Pinus cembra ssp. sibirica trees allowed reconstruction of 123...
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In: Arctic Antarctic and Alpine Research, 2005, vol. 37(3), p. 387-395
Three major rainfall events have caused considerable damage in the Valais region (Swiss Alps) since 1987. While important debris flows originating from periglacial environments were recorded during the August 1987 and September 1993 rainfall events, no debris flows occurred in October 2000. This paper aims at putting these large area events and the apparent increase in debris flow frequency into...
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In: Zeitschrift für Geomorphologie, 2005, vol. 49, no. 1, p. 89-106
La dendrochronologie a été utilisée pour étudier 25 ans d’activités de chutes de pierres sur le versant boisé de Täschgufer, à Täsch (Alpes suisses). Une nouvelle approche, basée sur l’apparition de tissu calleux et de canaux résinifères résultant d’impacts dus à des chutes de pierres, permet de déterminer la saison des événements. Les résultats issus de l’analyse de...
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In: Geomorphology, 2005, vol. 68(3-4), p. 224
For the first time, dendrogeomorphology has been used to investigate spatial and temporal variations of rockfall activity in a protection forest. We report results of 564 cores from 135 severely injured Larix decidua Mill. trees on the west-facing Täschgufer slope, Swiss Alps. While trees sampled reached an age of 297 years on average, the oldest one attained breast height in AD 1318. For...
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