Abstract
As the traditional displacement value of a landslide is very easy to be affected by rainfall, it is very difficult to establish a stable and uniform destabilized criterion of landslide in terms of the displacement value. So, it determines that establishment of an effective and stable dynamic displacement prediction parameter is very important in forecast of the debris landslides caused by rainfall. In order to determine this kind of prediction parameter, this paper first completes analysis on the relationship between the destabilized mechanism of the debris landslide and the rainfall dynamic rules. The relationship above shows that the periodical change value of rainfall can be taken as the dynamic unload–load parameter (ULP) of landslide, and the homologous change value of mensal landslide displacement can be taken as the stability displacement response parameter (DRP). Then, on the basis of the relationship between the ULP and the stability DRP of this kind of landslide, the unload–load displacement response ratio (ULDRR) appraisal parameter of this kind of landslides is established in this paper. Finally, the stability of typical debris landslides in China has been systematically studied by means of ULDRR appraisal parameter and model. We find that the ULDRR values conform to the evolutional rule of slope deformation and instability. So, it has been proved that the ULDRR parameter and the appraisal model are suitable and effective for prediction and evaluation of stability and evolution rule of rainfall-induced landslides.
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Acknowledgements
The study was supported by National Natural Science Foundation of China (41372297). Mr. Yan Xueqing, postgraduate Guo Lu has done much significant work in analysis of data in this paper. The authors appreciate them very much for the work and achievement that they have done.
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Keqiang, H., Min, Z., Yongjun, Z. et al. Unload–load displacement response ratio parameter and its application in prediction of debris landslide induced by rainfall. Environ Earth Sci 76, 55 (2017). https://doi.org/10.1007/s12665-016-6372-0
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DOI: https://doi.org/10.1007/s12665-016-6372-0