用同位素和多种模型确定大流域的地表水的蒸发和演变
Xiang Dong1, Xing Chen2, Fazhi Xie3
1School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China; Laboratory of Mine Ecological Restoration Engineering, Hefei, Anhui Province 230601, China.
Journal of contaminant hydrology
|October 22, 2024
概括
长江的地表水主要是由岩石风化和人类活动形成的. 地质因素主导离子来源,上游蒸发较高.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 水文学的水文学
背景情况:
- 了解地表水的化学成分对于评估地质影响和人类影响至关重要.
- 长江是中国最大的水源,需要详细研究其离子起源和形成过程.
研究的目的:
- 量化评估长江地表水中的水源补充和蒸发强度.
- 确定主要的离子来源和影响地表水组成的控制因素.
主要方法:
- 使用了水化学分析.
- 使用的稳定同位素 (δ18O, δD).
- 应用Craig-Gordon和APCS-MLR模型进行定量评估.
主要成果:
- 水化学类型的变化在上游 (HCO3−-Ca2+,Na+-K+) 和中游/下游 (HCO3−-Ca2+,SO42−-Ca2+) 之间.
- 岩石气候变化和人类投入是液化化学进化的关键驱动力.
- 地表水由降水补充;上游显示出更高的蒸发强度.
- 地质因素 (80.5%) 是水化成分的主要来源,其次是工业投入 (11.1%) 和农业投入 (6.4%).
结论:
- 这项研究阐明了长江地表水的化学组成,水源和演化机制.
- 这些发现为水质管理和盆地的可持续发展提供了科学基础.
相关概念视频
01:30Typical Model Studies
340
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
340
01:10Volatilization
372
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
372