区域地震滑坡体积计算模型研究及应用——以2008年汶川地震滑坡为例

项目名称： 区域地震滑坡体积计算模型研究及应用——以2008年汶川地震滑坡为例

项目编号： No.41202235

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 许冲

作者单位： 中国地震局地质研究所

项目金额： 25万元

中文摘要： 最新的汶川地震滑坡解译与调查结果表明，2008年汶川地震触发了超过197,000处滑坡。构建一种全新的区域地震滑坡体积计算模型与求取滑坡体积分布具有重要的科学意义与实用价值。本项目在进行详细完善的汶川地震滑坡编录的基础上，结合测量、GIS与遥感技术，获取滑坡的三维几何参数与环境控制变量，建立滑坡属性数据库；选取一定数量的滑坡样本，根据滑坡发生前后地形差别计算其体积，进行滑坡体积数学模型的训练；根据滑坡体积与滑坡三维几何参数、环境控制变量之间的关系，构建一种滑坡体积计算数学模型，对其它区域地震滑坡事件具有指导意义；应用滑坡样本与统计分析方法确定滑坡体积模型的参数；将这一模型应用于汶川地震滑坡数据库，从而得到每个滑坡的体积，进而构建整个震区堆积物体积分布等值线图，为开展后续汶川地震区河流与地貌演化、不同几何特征与运动习性断裂控制下的地表破坏特征与范围、地貌改变量研究等奠定基础。

中文关键词： 汶川地震滑坡；体积；线性；非线性；优化模型

英文摘要： It is indicated that more than 197,000 landslides triggered by the May 12, 2008 Wenchuan earthquake (Ms 8.0) in China base on our latest research result. There is important scientific significance and practical value to build a new regional seismic landslide volume calculation model and calculate regional landslides deposit volume distribution related with the earthquake. First of all, a detailed inventory of landslides triggered by the earthquake and the landslide property database, containing three dimensional geometric factors and controlling parameters of all landslides, were established using remote sensing and Geographical Information Systems (GIS) technologies combined with selected field measurements. The second, hundreds of landslide, selected as samples for subsequent landslide volume model training, were obtained according to the topographic differences before and after landslide occurrence. And then, landslide volume calculation mathematical model was constructed based on the relationship between landslide volume and three-dimensional geometric factors and controlling parameters, and constants of the model were calculated using the above landslide volume samples and statistical method. The method can be applied in similar study of other regional seismic landslide events. Finally, the model was used i

英文关键词： Wenchuan earthquake-triggered landslide；volume；linear；nonlinear；optimization model