Improved Information Value Model and Its Application in the Spatial Prediction of Landslides
ZHAO Heng and SONG Er xiang
DOI:10.11835/j.issn.1674-4764.2011.03.008
Received October 25, 2010,Revised , Accepted , Available online July 01, 2015
Volume ,2011,Pages 38-44
- Abstract
Information Value Model is used frequently in domestic landslide hazard zonation prediction, which plays a very important role for land-use planning especially in mountain area. Through theoretical analysis, the prerequisite of Information Value Model which should be used with influence-factors independent from each other is studied. Factor Analysis is adopted to evaluate and eliminate the influence of correlation between influence-factors in spatial prediction of landslides which are showed through case study. Relationships between landslides and influence-factors are studied based on a certain watershed in which the Information Value Model and Factor Analysis are applied. The probability of landslides changes regularly with the influence-factors, and based on which a method for the discretization of influence-factors is advised. The distribution of landslide susceptibility of above watershed is calculated and validated based on the area-ratio index with landslides occurring in nearly 5 years, which proves the credibility of Information Value Model.