由河流域的低热交换驱动的液化化学进化,中国西北地区的河流域
Shilei Yang1, Nan Li1, Bin Tang1
1Xi'an Key Laboratory of Environmental Simulation and Ecological Health in the Yellow River Basin, College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China.
Journal of environmental management
|March 5, 2026
概括
河流交换 (HE) 在河流盆地之间差异很大,影响水的化学成分. 了解这些流域规模模式对于管理地下水和地表水相互作用以及河流健康至关重要.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 地质化学 地质化学
背景情况:
- 低温交换 (HE) 对于地下水与地表水的相互作用以及河流中的水地化学循环至关重要.
- 以前的研究集中在可达规模的高等教育,忽视了流域规模的空间异质性及其水化学效应.
研究的目的:
- 在半干旱的河流流域中量化HE的空间模式和相关的水化反应.
- 了解不同的高等教育制度如何影响水质和溶液运输.
主要方法:
- 现场温度概况和沉积物特性分析.
- 表面和孔水的水化学分析.
- 主要成分分析 (PCA) 用于水化数据的解释.
主要成果:
- 它呈现出一个纵向梯度,从上游/中游的强上游 (17.71316.04 mm d−1) 转向下游的弱下游.
- 上游带来了富含Ca-HCO3的地下水,增加了主要离子度,而下游带来了氧化的河水,增强了稀释和氧化还原缓冲.
- 度差异很大,上游区域的地表水TN更高,这表明基于高温系统的独特水化特征.
结论:
- 高温空间异质性显著影响河流水化学和水质,跨流域规模.
- 了解流域规模的高温是有效管理半干旱地区地下水和地表水相互作用的关键.
- 它调解溶液的运输和混合,影响河流的化学成分和质量轨迹.
相关概念视频
01:00The Water Cycle
29.2K
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
29.2K
02:03Xylem and Transpiration-driven Transport of Resources
27.3K
The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
27.3K
01:17Precipitation and Co-precipitation
4.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.7K
02:34Water and Mineral Acquisition
36.1K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
36.1K
01:24Diversity of Archaea II
592
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
592
01:26Regulation of Water Output
2.5K
The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
2.5K