冰川海洋水域的地下水运输:古盐和山体滑坡的影响
M J Hinton1, S Alpay1, H L Crow1
1Natural Resources Canada, Geological Survey of Canada, Ottawa, Ontario, Canada.
Ground water
|January 13, 2026
概括
冰川海洋泥土中的海盐分泄漏导致滑坡风险. 地下水建模量化了这种浸出过程,揭示了其当前的深度和缓慢的进展,这与沉积物的地质技术敏感性增加有关.
科学领域:
- 地质技术工程 地质技术工程
- 水文地质学 水文地质学
- 环境科学 环境科学
背景情况:
- 冰川海洋泥孔水中海洋盐度的浸出是已知的滑坡危险的前体.
- 圣劳伦斯低地和太华山谷的香林海沉积物形成了一个区域水域,影响地下水的流动和稳定性.
- 了解过去和未来的浸对于评估这些地区的山体滑坡风险至关重要.
研究的目的:
- 量化香海沉积物的垂直地下水流和古盐度.
- 描述过去和未来海洋盐度浸与深度的进展情况.
- 将浸出程度与地质技术敏感性和山体滑坡危险联系起来.
主要方法:
- 一维地下水运输建模模模拟孔水化物和三角洲18O与深度.
- 对孔水中化物度和稳定同位素 (delta 18O) 的分析.
- 三元混合模型 (海水,冰川融水,流星水) 限制初始条件.
主要成果:
- 剩余的海水以高孔水 (高达12.250毫克/公斤) 和三角洲18O (高达-7.18‰) 表示.
- 在2.402.51mm/a和初始海水含量 (7280%) 之间,受限制的特异性排放 (q).
- 下面的浸出达到20.6米,目前的浸出前线进展率为2.5米/1000年,比淡水透速度慢.
结论:
- 地下水建模有效地限制了香海沉积物中的古盐度和浸进展.
- 缓慢的浸出前线进展受到溶液扩散和分散的影响,尽管淡水透.
- 增加的地质技术敏感性是滑坡危险的关键因素,与这些沉积物中漏区域直接相关.
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