Abstract
Abstract. Stability analysis is of great significance to landslide hazard prevention, especially the dynamic stability. However, many existing stability analysis methods are difficult to analyse the continuous landslide stability and its changing regularities in a uniform criterion due to the unique landslide geological conditions. Based on the relationship between displacement monitoring data, deformation states and landslide stability, a state fusion entropy method is herein proposed to derive landslide instability through a comprehensive multi-attribute entropy analysis of deformation states, which are defined by a proposed joint clustering method combining K-means and a cloud model. Taking Xintan landslide as the detailed case study, cumulative state fusion entropy presents an obvious increasing trend after the landslide entered accelerative deformation stage and historical maxima match highly with landslide macroscopic deformation behaviours in key time nodes. Reasonable results are also obtained in its application to several other landslides in the Three Gorges Reservoir in China. Combined with field survey, state fusion entropy may serve for assessing landslide stability and judging landslide evolutionary stages.
Highlights
Landslides are some of the greatest natural hazards, accounting for massive damages of properties every year (Dai et al, 2002)
As a typical numerical simulation method, finite element method (FEM) subdivides a large problem into smaller, simpler parts that are called finite elements
This definition is mainly based on the following reasons: (1) state occurrence entropy and state transition entropy emphasise the different attributes of deformation states, they are both expressed in the form of information entropy
Summary
Landslides are some of the greatest natural hazards, accounting for massive damages of properties every year (Dai et al, 2002). Analysis of landslide stability as well as its changing regularities plays a significant role in risk assessment at site-specific landslides (Wang et al, 2014) For this concern, many stability analysis methods have been proposed, such as Saito’s method, limit equilibrium method (LEM) and finite element method (FEM) (Saito, 1965; Duncan, 1996; Griffiths and Fenton, 2004). Shi and Jin (2009) proposed a generalized information entropy approach (GIE) to evaluate the “energy” of multi-triggers of landslide and found that the GIE index showed a mutation before landslide failure in a case study This GIE method is aimed at landslide triggering factors and cannot directly indicate landslide stability. A state fusion entropy (SFE) approach is proposed for continuous and site-specific analysis of landslide stability changing regularities It firstly defines deformation states as an integrated numerical feature of landslide deformation. A historical maximum index is introduced to identify key time nodes of stability changes
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