Zhang Guo-ping, Xu Jing, Bi Bao-gui
National Meteorological Center, Beijing 100081, China.
Ying Yong Sheng Tai Xue Bao. 2009 Mar;20(3):653-8.
To clarify the relations of landslide and debris flow hazards to environmental factors is of significance to the prediction and evaluation of landslide and debris flow hazards. Base on the latitudinal and longitudinal information of 18431 landslide and debris flow hazards in China, and the 1 km x 1 km grid data of elevation, elevation difference, slope, slope aspect, vegetation type, and vegetation coverage, this paper analyzed the relations of landslide and debris flow hazards in this country to above-mentioned environmental factors by the analysis method of frequency ratio. The results showed that the landslide and debris flow hazards in China more occurred in lower elevation areas of the first and second transitional zones. When the elevation difference within a 1 km x 1 km grid cell was about 300 m and the slope was around 30 degree, there was the greatest possibility of the occurrence of landslide and debris hazards. Mountain forest land and slope cropland were the two land types the hazards most easily occurred. The occurrence frequency of the hazards was the highest when the vegetation coverage was about 80%-90%.
阐明滑坡和泥石流灾害与环境因素之间的关系对于滑坡和泥石流灾害的预测和评估具有重要意义。基于中国18431处滑坡和泥石流灾害的经纬度信息，以及海拔、高差、坡度、坡向、植被类型和植被覆盖度的1km×1km网格数据，本文采用频率比分析方法分析了该国滑坡和泥石流灾害与上述环境因素之间的关系。结果表明，中国的滑坡和泥石流灾害更多发生在第一和第二过渡带的低海拔地区。当1km×1km网格单元内的高差约为300m且坡度约为30度时，发生滑坡和泥石流灾害的可能性最大。山地林地和坡耕地是最容易发生灾害的两种土地类型。当植被覆盖度约为80%-90%时，灾害的发生频率最高。
