上游山河流域的地表地下水相互作用和充电源:从稳定的同位素特征和水地化学过程的洞察力
Shijin Rajan1, Janardhana Raju Nandimandalam1
1School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India.
Environmental research
|April 13, 2025
概括
这项研究揭示了河水和地下水如何相互作用,以及利用稳定的同位素和水地化学方法在山河上游盆地产生充电源的地方. 调查结果显示,冰川融水充电了上游流域,而季风降雨充电了下游地区,这对水资源管理至关重要.
科学领域:
- 水文学和水文地质学
- 环境科学 环境科学
- 同位素地球化学 同位素地球化学
背景情况:
- 地表水与地下水的相互作用对水文和生态系统至关重要.
- 山河上游流域 (UYRB) 呈现出多样化的地形和气候,影响水资源.
- 了解充电源和连接对于水资源稀缺地区的水资源管理至关重要.
研究的目的:
- 调查河流水和地下水的连接,并确定UYRB中的充电源.
- 分析受地形和气候影响的水资源的空间和季节性变化.
- 为UYRB的气候弹性水资源管理提供见解.
主要方法:
- 稳定同位素 (δ18O和δ2H) 的整合,水地化学和统计分析.
- 收集和分析233个水样 (河流,地下水,春天,雨,雪) 在UYRB.
- 应用多变量分析 (PCA和HCA) 来了解水岩相互作用和流动路径.
主要成果:
- 冰川和融雪驱动上游流域的夏季充电,而季风降雨则主导下游充电.
- 河水的同位素成分受到高度的强烈影响,在整个盆地观察到不同的水化学面体.
- 地下水和河水同位素反映了区域降水特征,较高的d-超值值表明水分来源的影响.
结论:
- 强烈的河水和地下水相互作用得到证实,特别是在下游流域.
- 在UYRB.中确定的捕捞区特定的充电源和水文过程.
- 该研究为该地区的可持续和气候适应性水资源管理提供了关键数据.
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