[1]吴先谭a,邓 辉a,b*,等.基于斜坡单元自动划分的滑坡易发性评价[J].山地学报,2022,(4):542-556.[doi:10.16089/j.cnki.1008-2786.000692]
　WU Xiantana,DENG Huia,b*,et al.Evaluation of Landslide Susceptibility Based on Automatic Slope Unit Division[J].Mountain Research,2022,(4):542-556.[doi:10.16089/j.cnki.1008-2786.000692]
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基于斜坡单元自动划分的滑坡易发性评价
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2022年第4期
页码:
542-556
栏目:
山地灾害
出版日期:
2022-09-15

文章信息/Info

Title:
Evaluation of Landslide Susceptibility Based on Automatic Slope Unit Division
文章编号:
1008-2786-(2022)4-542-15
作者:
吴先谭a; 邓 辉a; b*; 张文江a; 卓文浩a
成都理工大学 a. 地球科学学院; b. 地质灾害防治与地质环境保护国家重点实验室,四川 成都 610059
Author(s):
WU Xiantana;  DENG Huia; b*;  ZHANG Wenjianga;  ZHUO Wenhaoa
a. College of Earth Sciences; b. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059
关键词:
滑坡易发性;  斜坡单元;  频率比模型;  机器学习模型;  毛尔盖水库
Keywords:
landslide susceptibility;  slope unit;  frequency ratio;  machine learning model;  Maergai Reservoir
分类号:
P642.22
DOI:
10.16089/j.cnki.1008-2786.000692
文献标志码:
A
摘要:
将斜坡单元与机器学习模型相结合,对比分析不同机器学习模型在斜坡单元中滑坡易发性评价的差异性,有助于优化预测的精确性和结果的稳定性,为滑坡的预测提供科学依据。本文以四川省黑水县毛尔盖水库地区为研究区,利用r.slopeunits方法自动划分斜坡单元,采用地理探测器(GeoDetector)方法优化滑坡易发性评价指标体系,以斜坡单元为基础分别应用频率比(FR)、频率比-随机森林(FR-RF)、频率比-支持向量机(FR-SVM)、频率比-人工神经网络(FR-ANN)耦合模型对滑坡易发性进行空间预测,并对比分析不同模型在滑坡易发性评价中的性能差异。结果表明:(1)r.slopeunits方法提取的斜坡单元内部坡向均一性较好,满足滑坡稳定性分析方法中计算单元均一性假设;(2)地理探测器筛选的12个评价因子相关性分析表明,没有冗余的评价因子被输入到机器学习模型,保证了模型的可靠性和预测能力;(3)Kappa系数、准确率(Accuracy)、AUC值联合表明预测能力由大到小依次为FR-RF模型、FR-SVM模型、FR-ANN模型、FR,相较于其他模型,FR-RF模型的预测结果中极高和高易发区的滑坡面积占比最高,达到86.89%。研究成果表明FR-RF耦合模型更适用于以斜坡单元为基础的滑坡易发性评价,可为西南深切河谷区域滑坡易发性评价提供理论指导。
Abstract:
Comparing and analyzing the difference of landslide susceptibility results evaluated by different machine learning models based on slope unit, the accuracy and the stability of prediction results can be optimized, which can provide a scientific basis for landslide prediction. In this paper, slopes in the Maurge Reservoir of Heishui county, Sichuan, China was selected for case study. The r.slopeunits tool was introduced to automatically extract slope units in a model of landslide susceptibility evaluation, and the GeoDetector method was used to optimize its index system. Then it took four models, Frequency Ratio(FR), Frequency Ratio-Random Forest(FR-RF), Frequency Ratio-Support Vector Machine(FR-SVM), and Frequency Ratio-Artificial Neural Network(FR-ANN)to delineate areas prone to landslides, and their performances were evaluated. The following results are listed:(1)Slope units extracted by the r.slopeunits tool had good internal aspect homogeneity satisfying the assumption of calculating unit uniformity in a landslide stability analysis;(2)The correlation analysis of 12 evaluation factors collected by GeoDetector showed that no redundant evaluation factors were input into the machine learning model, which ensured the reliability and prediction ability of the models;(3)The Kappa coefficient, Accuracy(Accuracy), and AUC values suggested that the order of prediction ability was FR-RF, FR-SVM, FR-ANN, and FR. Compared to other models, the FR-RF model predicted 86.89% of the landslide area in extremely high and high susceptibility zones, the greatest proportion among all models. In a word, with the coupled FR-RF model, our proposed approach is more suitable for evaluating landslide susceptibility based on auto-division of slope units in a model of landslide stability analysis. This study provides a theoretical guidance for predicting landslide hazards in deep river valleys in southwest China.

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备注/Memo

备注/Memo:
收稿日期(Received date):2021-12-07; 改回日期(Accepted date): 2022-08-14
基金项目(Foundation item):西藏自治区科学技术厅重点研发计划(XZ202001ZY0056G); 四川省地质灾害隐患遥感识别监测项目(510201202076888); 四川矿产资源研究中心科研项目(SCKCZY2017-YB08)。[Key Research and Development Program of Science and Technology Department of Tibet(XZ202001ZY0056G); Remote Sensing Identification and Monitoring Project of Hidden Geological Hazards in Sichuan Province(510201202076888); Sichuan Mineral Resources Research Center's Scientific Research Project(SCKCZY2017-YB08)]
作者简介(Biography):吴先谭(1996-),男,四川达州人,硕士研究生,主要研究方向:滑坡灾害早期识别和风险评价。 [WU Xiantan(1996-), male, born in Dazhou, Sichuan province, M.Sc. candidate, research on landslide hazard early identification and risk evaluation] E-mail: wuxiantan@stu.cdut.edu.cn
*通讯作者(Corresponding author):邓辉(1984-),男,湖南醴陵市人,博士,讲师,主要研究方向:滑坡灾害早期识别和风险评价。 [DEN Hui(1984-), male, born in Liling, Hunan province, Ph.D., lecturer, research on landslide hazard early identification and risk evaluation] E-mail: dengh@cdut.edu.cn
更新日期/Last Update: 2022-08-30