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- Title
基于斜坡单元与随机森林模型的元阳县崩滑 地质灾害易发性评价.
- Authors
刘帅; 朱杰勇; 杨得虎; 马博
- Abstract
The model based on grid unit and qualitative and quantitative method has the disadvantages of low prediction accuracy and frequent use in the evaluation of geological hazard susceptibility, was utilized to evaluate the potential for collapse and landslide in Yuanyang County. Using ArcGIS, 7 851 slope units were divided via the curvature watershed method. Through a large number of statistical study and analysis of geological environment condition, nine evaluation factors were selected, including engineering geological petrofabric, landform type, elevation, gradient, slope direction, curvature, ups and downs, rivers, distance and fault distance. These factors were analyzed and their weights determined using SPSS software, in conjunction with data on the development characteristics of disaster points. The random forest model was then applied to establish a vulnerability evaluation model, which categorized landslide geological disaster in Yuanyang County into four types: low, medium, high and extremely high, occupying an area of 410.06 km², 470.21 km², 550.02 km2 and 776.87 km² respectively. These areas correspond to 18.58%, 21.30%, 24.92% and 35.20% of Yuanyang County’s total area. The evaluation results were compared with the detailed investigation results and were found to be highly consistent. The accuracy of ROC curve was calculated at 92.7%, indicating a high level of accuracy. The central and southwest parts of Yuanyang County were found to be highly susceptible to geological disasters.
- Publication
Chinese Journal of Geological Hazard & Control, 2023, Vol 34, Issue 4, p144
- ISSN
1003-8035
- Publication type
Article
- DOI
10.16031/j.cnki.issn.1003-8035.202207003