Landslide Photo Collections

Searchable USGS Photo and Multimedia Archive with Ordering Information

A debris flow was caused by the failure of a Moraine dam at laguna Cohup, Peru.

  • View of the breached morainal dam at laguna Cohup, Cordillera Blanca, Peru. The burst of water caused a debris flow which devastated the town of Huaraz, Peru. Field view is about 1 km. Photograph by the Swiss geologist Arnold Hein in 1952.
    1941peruhuar...
  • Debris-flow track of the 1941 debris flow near Huaraz, Peru, can be seen above the town. The rubbly surface is gradually being recultivated and the outlet of the morainal lake has been brought under control. Source of photo: http://www.episodes.org/backissues/54/ARTICLES--12.pdf
    huarazperu19...
  • Overflow revetment at the outlet of the morainal lake Laguna Laca (4,400 m), Cordillera Blanca, Peru. The solid masonry-concrete spillway prevents potentially disastrous erosion and mobilization of block debris during times of increased runoff into, and overflow from, the proglacial lake. http://www.episodes.org/backissues/54/ARTICLES--12.pdf
    huarazperu19...

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