Publications des scientifiques de l'IRD

Kim J. H., Fourcaud T., Jourdan C., Maeght Jean-Luc, Mao Z., Metayer J., Meylan L., Pierret Alain, Rapidel B., Roupsard O., De Rouw Anneke, Sanchez M. V., Wang Y., Stokes A. (2017). Vegetation as a driver of temporal variations in slope stability : the impact of hydrological processes. Geophysical Research Letters, 44 (10), p. 4897-4907. ISSN 0094-8276.

Titre du document
Vegetation as a driver of temporal variations in slope stability : the impact of hydrological processes
Année de publication
2017
Type de document
Article référencé dans le Web of Science WOS:000404131900063
Auteurs
Kim J. H., Fourcaud T., Jourdan C., Maeght Jean-Luc, Mao Z., Metayer J., Meylan L., Pierret Alain, Rapidel B., Roupsard O., De Rouw Anneke, Sanchez M. V., Wang Y., Stokes A.
Source
Geophysical Research Letters, 2017, 44 (10), p. 4897-4907 ISSN 0094-8276
Although vegetation is increasingly used to mitigate landslide risks, how vegetation affects the temporal variability of slope stability is poorly understood, especially in earthquake-prone regions. We combined 3-year long soil moisture monitoring, measurements of soil physical properties and plant functional traits, and numerical modeling to compare slope stability under paired land uses with and without trees in tropical, subtropical, and temperate landslide-and earthquake-prone regions. Trees improved stability for 5-12 months per year from drawdown of soil moisture and resulted in less interannual variability in the duration of high-stability periods compared to slopes without trees. Our meta-analysis of published data also showed that slopes with woody vegetation were more stable and less sensitive to climate and soil factors than slopes with herbaceous vegetation. However, estimates of earthquake magnitude necessary to destabilize slopes at our sites suggest that large additional stabilization from trees is necessary for meaningful protection against external triggers.
Plan de classement
Géologie et formations superficielles [064] ; Géophysique interne [066] ; Pédologie [068] ; Etudes, transformation, conservation du milieu naturel [082]
Description Géographique
LAOS ; COSTA RICA ; FRANCE ; ZONE TROPICALE ; ZONE TEMPEREE
Localisation
Fonds IRD [F B010070334]
Identifiant IRD
fdi:010070334
Contact