Show simple item record

dc.contributor.authorHu, Kaiheng
dc.contributor.authorWang, Zhang
dc.contributor.authorChen, Cheng
dc.contributor.authorLi, Xiuzhen
dc.date.accessioned2019-08-02T16:55:12Z
dc.date.available2019-08-02T16:55:12Z
dc.date.issued2019
dc.description.abstractDebris-flow susceptibility is controlled not only by static effective factors such as topography and lithology, but also by dynamic effective factors such as earthquake, rainfall and human activity. In this paper, a simple model of calculating the dynamic susceptibility is developed based on the assumption of linear relationship between the static and dynamic susceptibilities. The influence of earthquake and rainfall events is represent by two coefficients. The earthquake coefficient is considered as an exponential function of intensity, and a negative power function of elapsed time. The rainfall coefficient is proportional to the occurrence days of heavy rainfall. This model is applied to assess the debris-flow susceptibility of Hengduan mountainous area from 2000 to 2015. Four static effective factors including relative relief, slope, lithology and fault density are used to calculate the static susceptibility by ARCGIS grid toolbox. There are six earthquake events since 1995 whose intensity zones of >= VI are intersected with the Hengduan area. The earthquake coefficient is calculated with the intensity zoning data of each of the six events and then is accumulated to get the final earthquake coefficient in each year. TRMM satellite rainfall data from 2000 to 2015 are collected to extract the occurrence days of heavy rainfall which is used to calculate the rainfall coefficient. The dynamic susceptibilities from 2000 to 2015 are obtained by multiplying the static susceptibility with the earthquake and rainfall coefficients in respective year. The 2015 susceptibility map shows a qualitative agreement with the distribution map of disasters in 2015.
dc.format.mediumborn digital
dc.format.mediumproceedings (reports)
dc.identifier.urihttps://hdl.handle.net/11124/173119
dc.identifier.urihttp://dx.doi.org/10.25676/11124/173119
dc.languageEnglish
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.publisher.originalAssociation of Environmental and Engineering Geologists
dc.relation.ispartofSeventh International Conference on Debris-Flow Hazards Mitigation - Proceedings
dc.relation.ispartofAssociation of Environmental and Engineering Geologists; special publication 28
dc.rightsCopyright of the original work is retained by the authors.
dc.sourceContained in: Proceedings of the Seventh International Conference on Debris-Flow Hazards Mitigation, Golden, Colorado, USA, June 10-13, 2019, https://hdl.handle.net/11124/173051
dc.subjectdebris flow
dc.subjectsusceptibility
dc.subjectearthquake
dc.subjectrainfall
dc.subjectdynamic assessment
dc.titleEmpirical model for assessing dynamic susceptibility of post-earthquake debris flows
dc.typeText


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record