Abstract: On the basis of compositional characteristics of the colluvial landslide induced by rainfall, the model and equation of displacement dynamics of colluvial slope have been established. And then, the displacement dynamic pattern and features and the quantitative relationship between displacement and groundwater table or rainfall are analyzed. And it is found that the displacement dynamic features of colluvial slope are mostly determined by the groundwater table and its changing law and that there is a strong wave in displacement and velocity of displacement before the overall sliding of a slope. All the displacement dynamic laws show that it is not reasonable to use the single displacement response parameter of displacement or velocity of displacement to make the judgment and prediction of the stability of this kind of slope. Therefore, it will have a very significant and practical value to establish a multi-parameters prediction theory and model of displacement of the colluvial landslides.

Key words: colluvial landslide, displacement dynamic feature, displacement velocity, stability of slope