Short-term geomorphic observations in the Nepal Himalayas : contribution to the knowledge of geo-disasters along a road corridor
Résumé
In this paper, we focus on medium/small-scale landslides of the Middle Kali Gandaki (KG) valley, where the river cuts
across the >8000 m high peaks of Dhaulagiri and Annapurna Himal (the deepest gorge in the world). The study zone is very prone to geomorphic instability (very steep slopes, litho-units of varying resistance, the highest amount of rainfall in the Nepal Himalaya; Dahal and Hasegawa 2008). Mountainslopes are either made of rocky spurs with segments exceeding 70° in slope angle, or unstable, debris-covered slopes (<30°)
corresponding to older landslide material most prone to re-mobilization. The valley bottom displays narrow floor with discontinuous patches of aggradational terraces (i.e., latePleistocene and Holocene age).
Domaines
GéographieOrigine | Fichiers éditeurs autorisés sur une archive ouverte |
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