@article{fdi:010066697,
  title = {{L}andslides triggered by the {G}orkha earthquake in the {L}angtang valley, volumes and initiation processes},
  author = {{L}acroix, {P}ascal},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {G}orkha earthquake ({N}epal, 2015, {M}-w 7.9) triggered many landslides. {T}he most catastrophic mass movement was a debris avalanche that buried several villages in the {L}angtang valley. {I}n this study, questions are raised about its volume and initiation. {I} investigate the possibility of high-resolution digital surface models computed from tri-stereo {SPOT}6/7 images to resolve this issue. {T}his high-resolution dataset enables me to derive an inventory of 160 landslides triggered by this earthquake. {I} analyze the source of errors and estimate the uncertainties in the landslide volumes. {T}he vegetation prevents to correctly estimate the volumes of landslides that occured in vegetated areas. {H}owever, {I} evaluate the volume and thickness of 73 landslides developing in vegetated-free areas, showing a power law between their surface areas and volumes with exponent of 1.20. {A}ccumulations and depletion volumes are also well constrained for larger landslides, and {I} find that the main debris avalanches accumulated 6.95 x 10(6) m(3) of deposits in the valley with thicknesses reaching 60 m, and 9.66 x 10(6) m(3) in the glaciated part above 5000 m asl. {T}he large amount of sediments is explained by an initiation of the debris avalanche due to serac falls and snow avalanches from five separate places between 6800 and 7200 m asl over 3 km length.},
  keywords = {{L}andslides ; {S}eismic triggering ; {N}epal ; {DEM} ; {SPOT} ; {V}olumes ; {O}ptical satellite photogrammetry ; {D}ebris avalanche ; {NEPAL} ; {HIMALAYA}},
  booktitle = {},
  journal = {{E}arth {P}lanets and {S}pace},
  volume = {68},
  numero = {},
  pages = {art. 46 [10 p.]},
  ISSN = {1880-5981},
  year = {2016},
  DOI = {10.1186/s40623-016-0423-3},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066697},
}