| Slope Instability on Pyroclastic Deposits： Landslide Distribution and Risk Mapping in Zacapoaxtla, Sierra Norte De Puebla, Mexico |
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| 引用本文： | Esteban-Chávez,Marcos-López,Alcántara-Ayala.Slope Instability on Pyroclastic Deposits： Landslide Distribution and Risk Mapping in Zacapoaxtla, Sierra Norte De Puebla, Mexico[J].山地科学学报,2006,3(1):1-19. |
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| 作者姓名： | Esteban-Chávez Marcos-López Alcántara-Ayala |
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| 作者单位： | Institute of Geography UNAM Circuito Exterior C.U. Coyoacan 04510 Mexico D.F.，Institute of Geography UNAM Circuito Exterior C.U. Coyoacan 04510 Mexico D.F.，Institute of Geography UNAM Circuito Exterior C.U. Coyoacan 04510 Mexico D.F.，Institute of Geography UNAM Circuito Exterior C.U. Coyoacan 04510 Mexico D.F.，Institute of Geography UNAM Circuito Exterior C.U. Coyoacan 04510 Mexico D.F. |
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| 摘 要： | Introduction The impact produced by landsliding in diverse regions of the world has given rise to the development and implementation of different methods, techniques and tools to understand the mechanisms of movements involved, as well as to create maps o…
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| 文章编号： | 1679-6316（9006）01-0001-19 |
| 收稿时间： | 2005-08-14 |
| 修稿时间： | 2006-02-15 |
Slope instability on pyroclastic deposits: Landslide distribution and risk mapping in Zacapoaxtla, Sierra Norte de Puebla, Mexico |
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| R. C. Borja-Baeza,O. Esteban-Chávez,J. Marcos-López,R. J. Pe?a-Garnica,I. Alcántara-Ayala.Slope instability on pyroclastic deposits: Landslide distribution and risk mapping in Zacapoaxtla, Sierra Norte de Puebla, Mexico[J].Journal of Mountain Science,2006,3(1):1-19. |
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| Authors: | R C Borja-Baeza O Esteban-Chávez J Marcos-López R J Peña-Garnica I Alcántara-Ayala |
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| Institution: | (1) Institute of Geography, UNAM, Circuito Exterior, C.U., Coyoacan, 04510, Mexico, D.F. |
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| Abstract: | In October 1999, rainfall induced landslides devastated different communities of the Sierra Norte, Puebla, causing more than 250 victims and economic losses greater than $ 450 million. The town of Zacapoaxtla was one of the sectors most affected by slope instability due to the existing geological features and geomorphic characters determined by material properties, landforms and processes. Extensive areas formed by pyroclastic piedmonts developed on the Quaternary volcanic ignimbrite deposits highly dissected by marginal gully erosion combined with an extreme rainfall event played a significant role as an ideal scenario for the occurrence of landsliding. Distribution of landslides triggered by rainfall within the main sector of the Zacapoaxtla municipality was analyzed by using IKONOS images in terms of exploring the likely relationship between mass movement incidence and levels of vegetation density. The later was undertaken by means of producing an NDVI and applying a fragmentation algorithm. Finally, a map of potential areas of mass movements risk was produced based on the combination of a socio-economic vulnerability index, geologic and geomorphological maps and the spatial landslide distribution. |
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| Keywords: | Rainfall landslides IKONOS vegetation density risk Mexico |
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