Deformation Law for a Landslide in the Three Gorges Reservoir Area Based on Wavelet Analysis
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Abstract:
For a landslide with multiple GPS monitoring locations, only the displacements at a few typical locations were investigated and used to represent the overall deformation of the landslide, which often induces different results with the actual conditions. In this paper, the surface displacement monitoring data of a landslide in the Three Gorges Reservoir Area were adopted to obtain contribution rate of each monitoring displacement to the overall deformation, and then to determine the overall displacement curve. The mathematical method wavelet analysis was used to derive the overall displacement equation, and thus to analyze the influence mechanism and cycle of external factors (rainfall and water level) on the landslide deformation. The results showed that the landslide is potentially unstable at present, and the cycle of effects of rainfall and water level on the landslide deformation c is about 12 months. The prediction accuracy of displacement is about 92% using the overall displacement curve. This method can reflect the stability situation and development trend of landslide accurately and provide references for similar landslides.
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