大潮河周围地下水动态对农田土壤盐度的影响
Hayden A Tackley1, Barret L Kurylyk1, Craig B Lake1
1Dalhousie University, Department of Civil and Resource Engineering, Centre for Water Resources Studies, Halifax, NS, Canada, B3H 4R2.
The Science of the total environment
|April 12, 2024
概括
海平面上升可能会增加河口附近的地下水的盐度,将盐扩大86%. 这项研究评估了大潮河口气候变化对地下水盐度的影响,为沿海农业土壤的土地管理提供了信息.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 沿海生态 沿海生态
背景情况:
- 河口面临气候变化的影响,主要集中在地表水和盐水的入.
- 河口附近的地下水和土壤盐度研究不足,尽管河口条件的变化可能会产生影响.
研究的目的:
- 调查宏观潮河口系统中地下水盐度分布的现状和未来情况.
- 评估河口盐度变化对邻近农田和地下水的影响.
主要方法:
- 地下水的现场监测和电磁调查以绘制盐度的地图.
- 用现场数据校准的地下水流量和溶液运输的数值建模.
主要成果:
- 盐的地下水在河口附近形成了一层烟雾,与沿海盐不同.
- 短期干旱对邻近的地下水盐度的影响很小.
- 海平面上升增加了86%的盐水羽流量 (横向≤11米,垂直≤4.5米).
结论:
- 在这种环境中,广泛的土壤盐化不太可能发生,但透的含水层可能会经历更广泛的盐化.
- 调查结果为面临盐度增加的沿海地区的土地管理提供了洞察力.
- 河口盐度的变化对邻近的地下水系统产生重大影响,特别是海平面上升.
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