以云南省1961－2011年的滑坡泥石流灾害和逐日降水观测数据为基础，采用相关分析和小波变换分析方法，研究了云南滑坡泥石流与强降水变化的相关性特征和多时间尺度特征。结论为：近51年来云南滑坡泥石流活动频次呈现出逐步增长的趋势，云南滑坡泥石流与强降水的变化具有显著的相关关系，与暴雨的相关性最高，其次为大暴雨和大雨。云南滑坡泥石流与强降水变化表现出十分明显的多时间尺度变化特征。滑坡泥石流与强降水的变化均存在有6年的特征时间尺度变化，在6年的特征时间尺度上，云南滑坡泥石流的变化一般是相同或滞后于强降水的变化。%Based on the data of landslide debris flow disasters and daily precipitation from 1 961 to 201 1 ,cor-relation and multi-timescale characteristics of the strong precipitation and the landslide debris flows in Yunnan are investigated with correlation analysis and wavelet transform analysis methods.The results show that landslide and debris flow activity frequency showing a gradual increasing trend in recent 51 years,the variations of the strong pre-cipitation and landslide debris flows in Yunnan has significant correlation:the highest correlation with the rainstorm and secondly for heavy rainstorm and heavy rain.The variations of the strong precipitation and the landslide debris flow in Yunnan obviously display multi-timescale features.There were characteristic timescale changes in 6 years of the variation for the strong precipitation and the landslide debris flow,the characteristic time scale of 6 years,the changes of landslide and debris flow in Yunnan is generally identical to the change or lag behind the strong precipi-tation.
展开▼
