| C4.5算法和GIS技术在波密县滑坡灾害风险评估中的应用 |
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| 引用本文： | 娄超华,田荣燕,顾学颖,刘宁波.C4.5算法和GIS技术在波密县滑坡灾害风险评估中的应用[J].四川建材,2021(1):68-70. |
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| 作者姓名： | 娄超华 田荣燕 顾学颖 刘宁波 |
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| 作者单位： | 西藏大学工学院 |
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| 基金项目： | 西藏自治区重点科技计划项目:拉萨周边生命线工程地质灾害调查及防治措施研究(Z2014A19G2-11);西藏自治区大学生创新性实验训练计划项目:不确定决策树算法在西藏滑坡灾害预测中的应用研究(2017QCX025);西藏自治区大学生创新性实验训练计划项目:多因素综合作用下的溜砂坡威胁程度研究(2017QCX036)。 |
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| 摘 要： | 波密县地处西藏东南部,地貌地质环境特殊,滑坡灾害频发。本文选取地层岩性、边坡高度、边坡角度、坡面走向、水系距离和植被覆盖度作为评价因子,通过ArcGIS提取滑坡灾害评价因子相关数据,并利用C4.5算法建立的决策树分类模型对研究区域滑坡灾害的风险性进行了定量评估。结果表明:该模型总体预测精度达到89.7%,有效预测精度高达96.2%。表明该模型具有较高的精度和置信度,为波密县滑坡灾害的预测性分析提供参考。
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| 关 键 词： | 滑坡 C4.5算法 GIS 风险评估 |
Application of GIS technology and C4.5 algorithm in risk assessment of landslide disaster in Bomi county |
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| LOU Chaohua,TIAN Rongyan,GU Xueying,LIU Ningbo.Application of GIS technology and C4.5 algorithm in risk assessment of landslide disaster in Bomi county[J].Sichuan Building Materials,2021(1):68-70. |
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| Authors: | LOU Chaohua TIAN Rongyan GU Xueying LIU Ningbo |
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| Affiliation: | (School of Engineering,University of Tibet,Lhasa 850000,China) |
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| Abstract: | Bomi county is located in the southeast of Tibet.The geological environment is special and landslides occur frequently.In this paper,the lithology,slope height,slope angle,slope orientation,water system distance and vegetation coverage are selected as the evaluation factors.The relevant data of landslide hazard assessment factors are extracted by ArcGIS,and the decision tree classification model established by C4.5 algorithm is used.A quantitative assessment of the risk of landslide hazards in the study area was conducted.The results show that the overall prediction accuracy of the model is 89.7%,and the effective prediction accuracy is as high as 96.2%.It shows that the model has high precision and confidence,which provides a reference for the predictive analysis of landslide disasters in Bomi County. |
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| Keywords: | landslide C4 5 algorithm GIS risk assessment |
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