@article{fdi:010068368,
  title = {{M}orphology, structure and kinematics of a rainfall controlled slow-moving {A}ndean landslide, {P}eru},
  author = {{Z}erathe, {S}wann and {L}acroix, {P}ascal and {J}ongmans, {D}. and {M}arino, {J}. and {T}aipe, {E}. and {W}athelet, {M}arc and {P}ari, {W}. and {S}moll, {L}. {F}. and {N}orabuena, {E}. and {G}uillier, {B}ertrand and {T}atard, {L}ucile},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he large slow-moving landslide of {M}aca is located in the upper {C}olca valley (southern {P}eru), a region characterized by a well pronounced rainy period, and intense and recurrent sustained seismicity. {T}he landslide, developed in deep lacustrine deposits, has recently accelerated, threatening the {M}aca village. {T}his work aims at understanding the rupture mechanism and the causes of the recent landslide reactivation/acceleration. {W}e present a multidisciplinary characterization of the {M}aca landslide that includes: (i) geological and morphological mapping in the field; (ii) remote sensing analysis using an historical aerial photograph of 1955 and the {P}liades satellite images (2013); (iii) global positioning system ({GPS}) including time-series of surveys over 13 years, and continuous measurements over 14 months; (iv) a geophysical campaign with deep electrical resistivity tomography profiles acquired across the landslide mass. {O}ur study shows that this 60 {M}m(3) landslide, which can be classified as a clay/silt compound landslide, moved by 15m between 2001 and 2014 with a large inter-annual velocity variation (up to a factor of 500) depending on the rainfall intensity. {W}e suggest that these dramatic changes in velocity are the result of the combination of a threshold mechanism and the short intense rainy season in {P}eru. {T}his study reveals three main driving factors acting at different timescales: (i) over several decades, the river course has significantly changed, causing the {M}aca landslide reactivation in the 1980s due to the erosion of its toe; (ii) at the year scale, a minimum amount of rainfall is required to trigger the motion and this amount controls the landslide velocity; (iii) transient changes in slide velocity may occur anytime due to earthquakes. {T}his study particularly highlights the non-linear behaviour of the motion with rainfall.},
  keywords = {slow moving landslide ; lacustrine deposits ; forcing factors ; monitoring ; {P}eru ; {PEROU} ; {ANDES}},
  booktitle = {},
  journal = {{E}arth {S}urface {P}rocesses and {L}andforms},
  volume = {41},
  numero = {11},
  pages = {1477--1493},
  ISSN = {0197-9337},
  year = {2016},
  DOI = {10.1002/esp.3913},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068368},
}