Journal Title
Title of Journal: Nat Hazards
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Abbravation: Natural Hazards
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Publisher
Springer Netherlands
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Authors: Yuri Gorokhovich Elia Axinia Machado Luis Iván Girón Melgar Mahta Ghahremani
Publish Date: 2015/12/11
Volume: 81, Issue: 2, Pages: 869-886
Abstract
Guatemala is in the path of numerous atmospheric hazards that trigger landslides by saturating mountain slopes with water reducing their safety factor Available local studies of landslide characterization in Guatemala have indicated the importance of slope in hazard and risk mapping but for the most part ignored another topographic index aspect However many regional studies analyzing the effect of hurricanes on terrain show that Caribbean and Central American locations experience higher impact from hurricanes and storms on eastern southeastern southern and southwestern slopes Since hazard and risk mapping focuses on infrastructure and settlements located on slopes with various orientations this factor needs to be addressed This study uses landslide data from three areas in Guatemala affected by hurricanes Stan 2005 and Mitch 1998 The results from the conducted spatial and statistical analyses show a high association of landslide prone slopes with aspect within the 76 to 260 range ie eastern–southeastern–southern and southwestern slopes We hypothesize that this is the result of the regional wind circulation pattern governing moisture distribution Integrating aspect in landslide analysis may improve hazard and risk mapping in Guatemala and other Central American and Caribbean regions by taking into account the regional patterns of wind circulation and the dominant role of eastern–southeastern–southwestern slopes in landslide processesThis work was carried out with the aid of a grant from the InterAmerican Institute for Global Change Research IAI TISGIIPDS2014 which is supported by the US National Science Foundation Grant GEO1143506 We thank our collaborators from the Asociación Vivamos Mejor in Guatemala for their help with the field work and data used in this manuscript and are grateful to Dr Stefan Becker for his help in understanding wind data and hurricane circulation We are also thankful to the staff from NASA for their guidance and information about wind data and their assistance selecting datasets for this study The comments from anonymous reviewers greatly improved the paper structure
Keywords:
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