临环矿区北部地区基岩含水层水化学时空变化规律及控制因素。

IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Miao Zhang , Luwang Chen , Xiaowei Hou , Yongsheng Hu , Jie Zhang , Jun Li , Xiaoxi Yin , Xiaoping Shi , Xinyue Cai
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引用次数: 0

摘要

系统研究矿区基岩地下水在开采过程中的水化学演变规律,对于有效管理地下水资源和煤矿生产至关重要。本研究采用多元统计分析、水化学图解法、离子比值分析和概念模型,研究了中国临环北部矿区与煤炭开采直接相关的二叠系断裂砂岩含水层(PA)和石炭系太原地层石灰岩含水层(CTA)的时空特征和水化学演化规律。通过层次聚类分析(HCA)将采矿前后采集的 72 个地下水样本分为四组。主成分分析(PCA)和离子比率分析表明,水与岩石的相互作用涉及矿物溶解(碳酸盐、石膏、白云石、硅酸盐)、阳离子交换和常见离子效应。水化学演变受基岩古地形、含水层导水性和采矿排水的影响。古地形差异极大地影响了水与岩石的相互作用以及水化学的空间变化,地下水中的离子浓度随着古地形标高的降低而增加。水力传导模式反映了含水层特征的变化对矿物溶解的控制,从而导致水化学特征的微小变化。采矿活动破坏了含水层的还原环境,导致地下水 SO42- 浓度显著增加。这些发现为研究华北隐伏煤田地下水的水化学变化规律及其控制机制提供了启示和坚实的理论基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Patterns of spatiotemporal variations in the hydrochemistry and controlling factors of bedrock aquifers in the northern region of the Linhuan mining area

Patterns of spatiotemporal variations in the hydrochemistry and controlling factors of bedrock aquifers in the northern region of the Linhuan mining area
Systematically studying the hydrochemical evolution of bedrock groundwater in mining areas during mining process is crucial for effective groundwater resource management and coal mine production. The spatiotemporal characteristics and hydrochemical evolution patterns of the Permian fractured sandstone aquifer (PA) and the Carboniferous Taiyuan Formation limestone aquifer (CTA), both of which are directly associated with coal mining in the northern Linhuan mining area, China, were investigated using multivariate statistical analyses, hydrochemical graphical methods, ion ratio analysis, and a conceptual model. 72 groundwater samples, collected before and after mining, were classified into four groups by hierarchical cluster analysis (HCA). Principal component analysis (PCA) and ion ratio analysis indicated that water-rock interactions involve mineral dissolution (carbonates, gypsum, dolomite, silicates), cation exchange, and common ion effects. Hydrochemical evolution is influenced by bedrock paleotopography, aquifer hydraulic conductivity, and mining drainage. Paletopographic differences significantly influence water-rock interactions and spatial variability in hydrochemistry, with ion concentrations in groundwater increasing as paleotopographic elevation decreases. The pattern of hydraulic conductivity reflects the control exerted by variations in aquifer characteristics on mineral dissolution, leading to minor changes in hydrochemical characteristics. Mining activities disrupt the aquifer's reducing environment, resulting in a significant increase in groundwater SO42− concentration. These findings provide insights and a solid theoretical foundation for studying the hydrochemical variations patterns of groundwater and these control mechanisms in the hidden coal fields of North China.
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来源期刊
Journal of contaminant hydrology
Journal of contaminant hydrology 环境科学-地球科学综合
CiteScore
6.80
自引率
2.80%
发文量
129
审稿时长
68 days
期刊介绍: The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide). The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.
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