高地下水的空间分布和水地化学过程在中国的Hetao盆地
Kehui Yue1, Yapeng Yang1, Kun Qian1
1MOE Key Laboratory of Groundwater Quality and Health, China University of Geosciences, Wuhan 430078, China; State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution & School of Environmental Studies, China University of Geosciences, Wuhan 430078, China.
The Science of the total environment
|September 8, 2024
概括
赫塔奥盆地的高地下水与浅层含水层,蒸发和灌有关. 地表水灌引入,被保留在土壤中,并入地下水中.
科学领域:
- 水文地质学 水文地质学
- 环境化学环境化学
- 同位素水文学 同位素水文学
背景情况:
- 含量高的地下水对健康构成风险,其来源需要调查.
- 了解的来源和运输对于水资源管理至关重要.
研究的目的:
- 为了阐明Hetao盆地高地下水的起源和空间分布.
- 确定控制地下水中丰富的关键因素.
主要方法:
- 对540个地下水样本进行化学和同位素 (δ18O, δ2H) 分析.
- 统计分析包括相关性研究和机器学习模型 (随机森林,XGBoost).
- 评估水地化学条件和灌影响.
主要成果:
- 地下水中的度在1.32至2897μg/L之间,在浅水层 (<30米) 中度高 (>100μg/L).
- 蒸发透气,气候因素和灌实践是丰富的主要驱动因素.
- 是主要的物种,性弱,减少条件占主导地位.
结论:
- 赫塔奥盆地的高地下水主要由浅层含水层动态,蒸发和农业灌控制.
- 地表水灌作为的重要来源,可以积累并入地下水.
- 需要考虑水文地质学和灌实践的综合管理策略,以减轻高水平.
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