Susceptibility analysis of earthquake induced landslide-dam based on GIS

Yanan Fan, Guangqi Chen, Kiyonobu Kasama, Yange Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Some significant hazards may occur due to large landslide-dams formed by earthquake induced landslides. It presents serious threats to both life and property from possible upstream flooding as the impounded lake water level rises, possible dam failure and downstream flooding as rapid release of impounded water. In order to prevent those secondary disasters, we made an assumption that the landslide dam is only formed when a large amount of landslide deposits directly rush into a river with moderate or high-velocities, and then presented a practical prediction method to extract the dangerous slopes as sources of earthquake induced landslide-dam formation. The prediction procedure consists of the following steps: (1) Identification of all the slopes using spatial statistics; (2) The extraction of potential slopes according to our assumption using three spatial relation filters; (3) Stability analysis to determine landslide prone slopes and volume estimation of potential landslide deposits using Limit Equilibrium Analysis. (4) Production of susceptibility map by ranking the exact slopes. This method has been used to extract slopes those have potential to collapse and form landslide-dams in the catchment of Tongkou river based on the data from 2008 Wenchuan earthquake. The results show that the proposed method is effective and efficient.

Original languageEnglish
Title of host publication47th US Rock Mechanics / Geomechanics Symposium 2013
Pages2646-2653
Number of pages8
Publication statusPublished - Dec 1 2013
Event47th US Rock Mechanics / Geomechanics Symposium 2013 - San Francisco, CA, United States
Duration: Jun 23 2013Jun 26 2013

Publication series

Name47th US Rock Mechanics / Geomechanics Symposium 2013
Volume4

Other

Other47th US Rock Mechanics / Geomechanics Symposium 2013
CountryUnited States
CitySan Francisco, CA
Period6/23/136/26/13

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Fan, Y., Chen, G., Kasama, K., & Li, Y. (2013). Susceptibility analysis of earthquake induced landslide-dam based on GIS. In 47th US Rock Mechanics / Geomechanics Symposium 2013 (pp. 2646-2653). (47th US Rock Mechanics / Geomechanics Symposium 2013; Vol. 4).