前端侵蚀对山体滑坡稳定性的影响:一个多尺度监测和数值模拟案例研究
Xiaowei Li1,2,3, Shimei Wang1,3, Zhihong Fan1,3
1Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education, China Three Gorges University, Yichang, Hubei, China.
PloS one
|July 1, 2025
概括
本研究介绍了一种可靠的空中LiDAR-GPS融合技术,用于监测山坡变形. 整合GPS数据显著提高了LiDAR的准确性,揭示了侵蚀对山体滑坡稳定性的影响.
科学领域:
- 地质科学 地质科学
- 遥感 遥感 遥感 遥感
- 地质技术工程 地质技术工程
背景情况:
- 空载激光雷达提供大规模的山体滑坡监测,但与接触方法相比,其精度有限.
- 全球定位系统 (GPS) 提供了高精度,但无法捕捉全面的斜坡位移.
- 监测银行斜率变形需要综合方法,以提高准确性和覆盖率.
研究的目的:
- 提出和验证一个多尺度LiDAR-GPS融合技术,用于边坡变形监测.
- 用数值模型评估前边侵蚀对山体滑坡稳定的影响.
- 为了确定Shuping滑坡的主要控制因素和变形特征.
主要方法:
- 实施一个校正算法,将GPS监控数据与空中LiDAR结果集成在一起.
- 开发的技术应用于Shuping滑坡,用于变形监测.
- 开发一个数字模型,利用监测数据来分析侵蚀对稳定性的影响.
主要成果:
- 综合的空中LiDAR-GPS监测方法显示了更高的测量准确性和可靠性.
- 在舒平山滑坡的前边观察到不同的侵蚀模式,在东侧和西侧的侵蚀更高.
- 滑坡变形主要由水库水位下降控制,而前端侵蚀通过改变应力分布来降低稳定性.
结论:
- 空载LiDAR和GPS的融合是准确监测山坡变形的可靠方法.
- 前端侵蚀通过引起应力再分配和增加变形,显著影响了滑坡的稳定性.
- 水库水位波动是推动滑坡变形的关键因素,被侵蚀过程加剧.
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