Classification of geotechnical units and their associated slope movements for application to civil engineering in volcanic territories

Slope movements are one of the natural hazards that most affect volcanic islands and often cause alarm to society, as they produce considerable material losses, affect communications and basic community services and, on occasion, involve the loss of human lives. Based on the classification of geotechnical units of the Canary Islands and the characteristic slope movements observed in each of them, the main goal of this article has been to elaborate a classification of movements versus units, as a tool for the management landslides hazards in volcanic environments. The applied methodology was based on the types of slope movements defined by the USGS, and on the research team three decades of experience of the study of geotechnical characterisation and slope instability of volcanic formations. A graphical classification of the possible movements affecting the volcanic geotechnical units has been prepared to make a preliminary estimate of the types of movements that will affect a slope or hillside.