人为基础设施在一个主要的季风河流域中取代了沉积物产量的自然驱动因素
Sumit Das1, Soumi Talukdar2, Gianvito Scaringi1
1Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Charles University, Prague 12800, Czech Republic.
The Science of the total environment
|December 10, 2025
概括
人为基础设施,特别是水库区,在河流盆地显著控制沉积物产量 (SY),超过了降雨等自然因素. 捕捞规模也通过"稀释效应"影响SY.
科学领域:
- 水文学和沉积物学.
- 环境科学 环境科学
- 管理水资源 管理水资源
背景情况:
- 沉积物产量 (SY) 对水资源,生态和三角洲至关重要,但其自然和人为控制能力尚不清楚.
- 全球受监管的河流流域在管理沉积物动态方面面临挑战,原因是复杂的影响因素.
研究的目的:
- 综合分析自然和人为因素对沉积物产量空间变化的综合影响.
- 为了确定控制季风河流域沉积物产量的主要驱动因素.
主要方法:
- 采用了部分最小平方回归 (PLSR) 和多重线性回归 (MLR) 来分析36个地形,气候,土地利用和岩石学预测因素.
- 评估了印度卡维里盆地内的19个分捕获区,这些分捕获区因其代表性的异质性而被选中.
主要成果:
- 人类基础设施,特别是水库面积是占主导地位的控制因素,解释了SY变化的41%.
- 降雨是主要的自然驱动因素 (VIP=1.77),而流域规模参数 (面积,周边,溪长) 显示出显著的影响.
- 观察到一种"稀释效应",在具有更大的沉积物储存潜力的大型水域中,SY减少.
结论:
- 在受监管的水域中,沉积物供应受到一个层次的管理:人为基础设施,降雨量和水域规模是主要的调节者.
- 地形环境影响侵蚀潜力,但人类干预和规模效应是沉积物输送的关键.
- 该研究提供了一个可转移的框架,用于量化全球监管流域的沉积物动态,帮助水库管理和生态可持续性.
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