| 基于多期DEM和滑坡强度的滑坡风险评估 |
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| 引用本文： | 薛 强,张茂省,孙萍萍,程秀娟,Anders Solheim,Trond Magne Vernang.基于多期DEM和滑坡强度的滑坡风险评估[J].地质通报,2013,32(6):925-934. |
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| 作者姓名： | 薛 强 张茂省 孙萍萍 程秀娟 Anders Solheim Trond Magne Vernang |
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| 作者单位： | 1. 国土资源部黄土地质灾害重点实验室/中国地质调查局西安地质调查中心,陕西西安,710054
2. 挪威岩土工程研究院,挪威奥斯陆0806 |
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| 基金项目： | 中国地质调查局项目，国家科技支撑计划课题 |
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| 摘 要： | 滑坡危险性定量评估是滑坡风险评估中的关键和难点,也是当前国际风险管理研究中的热点问题.以滑坡密集分布的黑方台南塬为研究区,以32处典型滑坡为研究对象,依据多期三维数字高程模型(DEM),提出了一种基于强度的滑坡危险性定量评估技术方法.根据多期三维地形信息的解译及野外调查,编制多期滑坡分布图,计算滑坡活动的频率.利用GIS技术,利用滑坡体积与速度的乘积计算滑坡强度.将滑坡危险性定义为滑坡频率和滑坡强度的乘积,同时调查和分析了黑方台地区各类承灾体的类型、价值及其在相应滑坡强度下的易损性,在此基础上开展了单体滑坡风险评估和黑方台南塬滑坡风险区划.
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| 关 键 词： | 滑坡强度 频率 危险性 风险 黑方台 |
Landslide risk assessment based on multi-period DEM and activity intensity |
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| XUE Qiang,ZHANG Mao-sheng,SUN Ping-ping,CHENG Xiu-juan,Anders Solheim,Trond Magne Vernang.Landslide risk assessment based on multi-period DEM and activity intensity[J].Geologcal Bulletin OF China,2013,32(6):925-934. |
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| Authors: | XUE Qiang ZHANG Mao-sheng SUN Ping-ping CHENG Xiu-juan Anders Solheim Trond Magne Vernang |
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| Institution: | 1. Key Laboratory for Geo-hazards in Loess Area, MLR/Xi'an Center of Geological Survey, CGS,
Xi'an 710054, Shaanxi, China;
2. Division for Natural Hazards Norwegian Geotechnical Institute, Oslo 0806, Norway |
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| Abstract: | Quantitative hazard assessment is the key and difficulty in landslide risk assessment and is also the hot issue in the current international risk management study. The method of landslide hazard quantitative assessment is proposed based on multi-period three-dimensional DEM and landslide intensity in the southern part of Heifangtai terrace, where 32 typical landslides are extensively distributed. Via interpretation of multi-period three-dimensional terrain information and field survey, the multi-period landslide inventory map was compiled and on this basis, the landslide frequency was calculated. Landslide intensity was calculated by the product of landslide volume and velocity using GIS technology. Landslide hazard was defined as the result of the landslide frequency timing landslide intensity. In the mean time, the types, values and vulnerability in corresponding landslide intensity of the elements at risk were investigated and analyzed in Heifangtai. On such a basis, single landslide risk assessment was carried out, and the landslide risk zoning map of southern Heifangta was compiled. |
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| Keywords: | landslide intensity frequency hazard risk Heifangtai |
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