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Position: Home > Articles > Risk Analysis of Loess Shallow Landslides Under Different Rainfall Conditions Bulletin of Soil and Water Conservation 2016,36 (3) 109-113

降雨作用下黄土浅层滑坡的危险性分析

作  者：
同霄;彭建兵;朱兴华;马鹏辉;孟振江
单  位：
长安大学
关键词：
黄土;浅层滑坡;SHALSTAB模型;危险性分析
摘  要：
[目的]在不同的降雨条件下,对黄土浅层滑坡进行危险性分析,为评价黄土地区浅层滑坡提供有效手段。[方法]以甘肃省天水市为例,根据SHALSTAB模型,在ArcGIS中进行二次开发,编写不同降雨量时浅层滑坡危险性分析程序,计算不同降雨量下浅层黄土滑坡分布预测。[结果]随着降雨量的增加,浅层滑坡数量明显增多,所占面积比例从5mm/d的0.166%增加为320mm/d的3.624%,上升了20倍左右。[结论]当降雨量较小时,浅层滑坡分布于雨水集中汇积的区域,随着降雨的增加,浅层滑坡沿着黄土沟谷向上游延伸。通过和实际发生滑坡灾害进行对比分析,证明计算结果准确可信。
译  名：
Risk Analysis of Loess Shallow Landslides Under Different Rainfall Conditions
作  者：
TONG Xiao;PENG Jianbing;ZHU Xinghua;MA Penghui;MENG Zhenjiang;College of Geology Engineering and Geomatics,Chang'an University;Key Laboratory of Western Mineral Resources and Geological Engineering of Ministry of Education;
关键词：
loess;;shallow landslide;;SHALSTAB model;;risk analysis
摘  要：
[Objective]To analyze the risk analysis of loess shallow landslide under different rainfall conditions in order to provide an effective way for the loess shallow landslide hazard analysis and evaluation.[Methods]The paper took Tianshui City of Gansu Province as a case study and wrote a program to analyze the shallow landslide hazard according to SHALSTAB model under ArcGIS platform.Then the distribution of shallow loess landslide was predicted with consideration of different rainfall conditions.[Results]With the increase of rainfall,the shallow landslides increased significantly,and the proportion increased from0.166%to 3.624% when the rainfall increased from 5mm/d to 320mm/d,increased by 20 times.[Conclusion]When the precipitation is low,shallow landslides area main distributed in rainfall concentrated area.When the precipitation increases,shallow landslides extend upward along the loess valley.The comparison with the actual landslide disasters showed that the calculation results are accurate and reliable.

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