Correlation between landslides and gradient in the Three Gorges Reservoir area based on GIS and information value model

Author

Wu, Caiyan ; Ding, Mingtao ; Wang, Qing ; Qiao, Jianping

Author_Institution

Sch. of Environ. & Resources, Univ. of Sci. & Technol., Mianyang, China

fYear

2010

fDate

18-20 June 2010

Firstpage

1

Lastpage

5

Abstract

Landslides, which develop in the Three Gorges Reservoir area, are caused by many factors. Gradient is one of the indispensable internal factors, besides lithology, relative height difference and slope profile. This paper studies how gradient affects regional landslide from Yunyang to Wushan segment in the Three Gorges Reservoir Area, and also focuses on quantifying the effect of gradient on landslides under the information value model, through Geographical Information System (GIS) technology. Based on an investigation of 205 examples of landslides during past 20 years, we found that the gradient among 20-50 degree contributes most to regional landslides development. Our research results can provide a sound basis for landslide stability assessment in the Three Gorges Reservoir area.

Keywords

geographic information systems; geomorphology; geophysical techniques; China; Three Gorges Reservoir; Wushan segment; Yunyang segment; geographic information system; information value model; landslide stability assessment; slope gradient; Databases; Geographic Information Systems; Geology; Hazards; Reservoirs; Stability analysis; Terrain factors; Geographical Information System (GIS); Three Gorges Reservoir area; gradient; information value model;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoinformatics, 2010 18th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-7301-4

Type

conf

DOI

10.1109/GEOINFORMATICS.2010.5567596

Filename

5567596