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基于GIS的山体滑坡易感区分使用结合模型:中国巴东县的一个案例研究
Peng Wang1, Hongwei Deng2, Yao Liu1
1School of Resources & Safety Engineering, Central South University, Changsha, 410083, Hunan, People's Republic of China.
Environmental science and pollution research international
|December 25, 2023
概括
使用信息值 (IV) 和后勤回归 (LR) 的新合模型准确评估了山体滑坡的易感性. 这种区域划分有助于确定高风险地区,以有效地预防和减轻山体滑坡的战略.
科学领域:
- 地质科学 地质科学
- 环境科学 环境科学
- 地理信息系统 (GIS) 是指地理信息系统.
背景情况:
- 土地滑坡易感区划对于有效的土地滑坡风险管理至关重要.
- 准确评估易发生山体滑坡的地区对于减轻灾害是必不可少的.
研究的目的:
- 为了评估中国巴东县的山体滑坡易感性.
- 开发和验证一个结合模型,整合信息值 (IV) 和后勤回归 (LR).
主要方法:
- 使用ArcGIS创建了一个包含11个滑坡倾向因素和588个历史滑坡的空间数据库.
- 开发了山体滑坡易感模型 (IV,LR和合的IV-LR).
- 模型性能使用接收器操作特征 (ROC) 曲线和山体滑坡密度分析进行了验证.
主要成果:
- 结合的IV-LR模型实现了0.818的最高曲线下面积 (AUC) 值,优于单独的IV (0.758) 和LR (0.786) 模型.
- 滑坡易感性显示,随着易感性水平的指数增长,合模型显示出更高的增长率.
- 确定了高和非常高的易感区,主要沿着河流和道路,特定的城镇被确定为主要的山体滑坡易发生地区.
结论:
- 结合的IV-LR模型为评估山体滑坡易感性提供了强大而准确的方法.
- 生成的易感性地图有助于识别关键区域,以针对地防滑坡和减缓工作.
- 这项研究提供了宝贵的见解和参考,用于类似地质环境中的山体滑坡管理.
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