云南小江流域滑坡关键影响因子研究

确定诱发滑坡失稳的关键因素是滑坡研究的一个重要内容。采用不同影响因子图层进行危险性分区结果存在明显差异,这是由于第一因子对于滑坡变形失稳的贡献程度不同,即不同影响因子与滑坡的相关性不同。在进行滑坡灾害分析时,必须首先确定影响滑坡的关键因子以建立准确的统计分析模型。采用滑坡确定性系数的合并检验方法,在GIS中对云南小江流域进行了滑坡影响因子分析,并确定了影响滑坡的关键性因子。据此建立的多元统计分析预测模型经检验具有较高精度,要以为小江流域的灾害防治、规划建设提供科学依据。

Study on the key landslide factor by means of GIS in Xiaojiang Valley,Yunnan

Determining the key triggering factors is an important step for landslide stability assessment. All factors have uncertainties, and different factors have different correlation to landslide hazard. Key triggering factor must be determined to establish correct landslide stability analysis model, especially statistical analysis model. Landslide factor susceptibility in Xiaojiang Valley is carried out by means of landslide certainty factor integration and verification. The key factors are determined and a statistical model is established for landslide assessment in Xiaojiang Valley. Statistic analysis shows that the model is reliable to explain most of the landslides in Xiaojiang Valley. The result obtained from model analysis could provide the scientific information for landslide prevention, planning and control in Xiaojiang Valley.