基于子流域的地震诱发崩塌敏感性评价
文献类型：期刊论文
| 作者 | 崔鹏 ; 张建强
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| 刊名 | 四川大学学报( 工程科学版)
 |
| 出版日期 | 2010-09 |
| 卷号 | 42期号:z1页码:43-49 |
| 关键词 | 崩塌 敏感性 统计学方法 汶川地震 |
| 其他题名 | Susceptibility Asessment of Landslides Induced by Earthquake Based on Sub-basin |
| 通讯作者 | 崔鹏 |
| 中文摘要 | 根据地震诱发的崩塌具有数量大和成区分布的特点,将研究区北川苏宝河流域划分为211个子流域,评价选取子流域的平均高程、最大高差、平均坡度、距离河流距离、沟谷密度和岩石类型等指标,采用Logistic回归的统计学方法进行建模,并且使用ROC曲线和Kappa系数对模型的精度进行评价,其ROC曲线下面积为0.926,Kappa系数为0.690。采用同样的评价方法基于像元对研究区进行建模,模型的ROC曲线下面积为0.814,Kappa系数为0.470,均小于基于子流域的评价模型。使用模型对研究区进行敏感性评价,基于子流域的敏感性评价,有90.04%的崩塌位于高敏感和敏感区域内,而基于像元的敏感性评价,高敏感和敏感区域内只占有68.82%的崩塌。但不同敏感性区域面积比例来看,基于子流域的敏感性评价,有高敏感区域面积过大的缺点。研究进一步提出崩塌响应单元这一概念,即针对崩塌的各影响因子,将研究区划分为比子流域更小的单元,而每个单元内部,对崩塌具有相同的敏感度。 |
| 英文摘要 | Landslide is one of the most common hazards induced by the Wenchuan Earthquake for its large quantity and wide distribution． The sub-basin was introduced into the assessment of landslides induced by earthquake． The Subao River Basin，Beichuan，which was chosen as the study area，was divided into 211 sub-basins，and the average elevation，maximum relative elevation，average slope gradient，distance to the river，gully density and stone type were chosen as the assessing factors． The statistical method Logistic regression was used to build the assessing model． The model was checked by ROC( Receiver Operating Characteristic) curve and Kappa． And the AUC( Aare Under Curve) and Kappa was 0． 926 and 0． 690，respectively，which was much better than the pixel-oriented susceptibility assessing model build by the same method． The AUC and Kappa was 0． 814 and 0． 470，respectively． From the susceptibility map，about 90． 04 percent of landslides located in the high susceptible area． The deficiency of the sub-basin oriented assessment was that the area of high susceptible area is too large． So at last the concept of LRU( Landslide Response Unit) was introduced． The sub-basin could be divided into smaller units by some factors related to landslide． The assessment based on LRU may have a better assessing result． |
| 学科主题 | 灾害学 |
| 资助信息 | 国家重点基础研究发展计划“973”计划资助项目(2008CB425803);科技支撑计划资助项目(2006BAC10B04);中科院知识创新工程重要方向资助项目(KZCX2-YW-Q03-5-2) |
| 语种 | 中文 |
| 公开日期 | 2013-06-14 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5380]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 推荐引用方式 GB/T 7714 | 崔鹏,张建强. 基于子流域的地震诱发崩塌敏感性评价[J]. 四川大学学报( 工程科学版),2010,42(z1):43-49. |
| APA | 崔鹏,&张建强.(2010).基于子流域的地震诱发崩塌敏感性评价.四川大学学报( 工程科学版),42(z1),43-49. |
| MLA | 崔鹏,et al."基于子流域的地震诱发崩塌敏感性评价".四川大学学报( 工程科学版) 42.z1(2010):43-49. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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