滑坡空间模式和河峡谷地形的相互作用:对三条平行河流地区的洞察,西藏高原东南部
Zongji Yang1, Bo Pang2, Wufan Dong2
1Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.
The Science of the total environment
|January 11, 2024
概括
三条平行河区的山体滑坡模式与河谷地形学密切相关. 增加的滑坡和滑坡水与更高的局部救济和侵蚀相关,揭示了地形和群体运动之间的反.
科学领域:
- 地质形态学 地质形态学
- 构造学 构造学 构造学 构造学
- 天然危害 天然危害
背景情况:
- 了解构造活跃的高山地区的地形演变需要分析滑坡的空间模式和河峡谷的地形.
- 西藏高原东南部的三条平行河流区 (TPRA) 提供了一个独特的环境来研究协同的地形和山体滑坡演变.
研究的目的:
- 检查TPRA中滑坡空间模式和河峡谷地形之间的相互作用和机制.
- 研究地形指数与滑坡特征 (面积密度和水频率) 之间的关系.
- 探索滑坡和山谷景观演变之间的反机制.
主要方法:
- 在努江,兰干和金沙河谷内的滑坡分布和聚合模式的空间分析.
- 地形指标 (局部浮标,表面侵蚀,值斜坡梯度) 和滑坡指标 (规范化滑坡面积密度 - NLAD,规范化滑坡水频率 - NFLD) 之间的相关性分析.
- 调查点对滑坡分布和景观演变的影响.
主要成果:
- 观察到一个明显的山体滑坡聚合模式,按照Nujiang>Lancang>Jinsha河的顺序.
- 滑坡聚合与增加的局部缓解,表面侵蚀指数和值斜率梯度有很强的相关性.
- 尼克点被发现对上游和下游的山体滑坡活动产生影响,表明与景观的反循环.
结论:
- 西藏高原东南部的地形演变与重大滑坡活动密切相关.
- 观察到的质量运动直接反映了区域地形形成模式.
- 这些发现有助于理解构造上升和表面侵蚀之间的动态平衡,这种平衡是由滑坡介导的.
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