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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2012, Vol. 13 Issue (12): 943-957    DOI: 10.1631/jzus.A1200054
Civil Engineering     
Physically-based approach to analyze rainfall-triggered landslide using hydraulic gradient as slide direction
Qi-hua Ran, Dan-yang Su, Qun Qian, Xu-dong Fu, Guang-qian Wang, Zhi-guo He
Department of Hydraulic Engineering, Zhejiang University, Hangzhou 310058, China; State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; Department of Ocean Science and Engineering, Zhejiang University, Hangzhou 310058, China
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Abstract  An infinite slope stability numerical model driven by the comprehensive physically-based integrated hydrology model (InHM) is presented. In this approach, the failure plane is assumed to be parallel to the hydraulic gradient instead of the slope surface. The method helps with irregularities in complex terrain since depressions and flat areas are allowed in the model. The present model has been tested for two synthetic single slopes and a small catchment in the Mettman Ridge study area in Oregon, United States, to estimate the shallow landslide susceptibility. The results show that the present approach can reduce the simulation error of hydrological factors caused by the rolling topography and depressions, and is capable of estimating spatial-temporal variations for landslide susceptibilities at simple slopes as well as at catchment scale, providing a valuable tool for the prediction of shallow landslides.

Key wordsShallow landslide      Infinite slope stability model      Hydraulic gradient      Physically-based hydrology model      Integrated hydrology model (InHM)     
Received: 28 February 2012      Published: 29 November 2012
CLC:  TV1  
Cite this article:

Qi-hua Ran, Dan-yang Su, Qun Qian, Xu-dong Fu, Guang-qian Wang, Zhi-guo He. Physically-based approach to analyze rainfall-triggered landslide using hydraulic gradient as slide direction. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2012, 13(12): 943-957.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1200054     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2012/V13/I12/943

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