不同采样策略下地震滑坡敏感性分析研究
发布时间：2018-11-05 07:03
【摘要】：针对地震滑坡规律复杂,预测难度大,而传统地震滑坡敏感性分析采样策略研究不足的问题,分析不同采样策略对地震滑坡敏感性分析的影响。以多边形缓冲区作为采样区,并将滑坡的发生区域及前两者总和2个采样策略用于对比实验。选取4·20芦山地震中受灾严重的宝盛乡作为研究对象,根据采样策略对滑坡各个评价因子进行采样,并构建支持向量机模型定量计算敏感性指数,再利用自然断点法生成敏感性区划图。通过多种方法对结果进行分析。其中,以多边形缓冲区为采样策略得到的滑坡正确率94.44%,受试者工作特征曲线下面积99.1%,种子单元面积指数综合评价效果最佳,3项结果均占优势。结果证明该采样策略是有效可行的,可为后续防灾减灾工作提供依据。
[Abstract]:Aiming at the problem that the law of earthquake landslide is complex and the prediction is difficult, and the traditional sampling strategy of seismic landslide sensitivity analysis is insufficient, the influence of different sampling strategy on seismic landslide sensitivity analysis is analyzed. The polygonal buffer zone is used as the sampling area, and the two sampling strategies of the occurrence area and the sum of the first two are used in the comparison experiment. Baosheng Township, which was badly affected by the Lushan earthquake, was selected as the research object. According to the sampling strategy, the evaluation factors of landslide were sampled, and the support vector machine model was constructed to quantitatively calculate the sensitivity index. Then the natural breakpoint method is used to generate the sensitivity map. The results are analyzed by various methods. Among them, the correct rate of landslide obtained with polygonal buffer as sampling strategy is 94.44, the area under the operating characteristic curve is 99.1 and the comprehensive evaluation effect of seed unit area index is the best, and the three results are superior. The results show that the sampling strategy is effective and feasible, and can provide the basis for the subsequent disaster prevention and mitigation work.
【作者单位】： 中国地质大学地球物理与空间信息学院;武汉工程大学资源与土木工程学院;中国地震局地震研究所;
【基金】：国家“863”高技术研究发展计划资助项目(2012AA121303)~~
【分类号】：P642.22
[Abstract]:Aiming at the problem that the law of earthquake landslide is complex and the prediction is difficult, and the traditional sampling strategy of seismic landslide sensitivity analysis is insufficient, the influence of different sampling strategy on seismic landslide sensitivity analysis is analyzed. The polygonal buffer zone is used as the sampling area, and the two sampling strategies of the occurrence area and the sum of the first two are used in the comparison experiment. Baosheng Township, which was badly affected by the Lushan earthquake, was selected as the research object. According to the sampling strategy, the evaluation factors of landslide were sampled, and the support vector machine model was constructed to quantitatively calculate the sensitivity index. Then the natural breakpoint method is used to generate the sensitivity map. The results are analyzed by various methods. Among them, the correct rate of landslide obtained with polygonal buffer as sampling strategy is 94.44, the area under the operating characteristic curve is 99.1 and the comprehensive evaluation effect of seed unit area index is the best, and the three results are superior. The results show that the sampling strategy is effective and feasible, and can provide the basis for the subsequent disaster prevention and mitigation work.
【作者单位】： 中国地质大学地球物理与空间信息学院;武汉工程大学资源与土木工程学院;中国地震局地震研究所;
【基金】：国家“863”高技术研究发展计划资助项目(2012AA121303)~~
【分类号】：P642.22
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