| 邵思慧,单强,李红超,李佳骏,李陆.冀东平原区地下水环境背景值研究——以唐山地区为例[J].地质找矿论丛,2025,40(3):356-363 |
| 冀东平原区地下水环境背景值研究——以唐山地区为例 |
| Study of Groundwater Environmental Background Values in the Jidong Plain Area: A Case Study of Tangshan Region |
| 投稿时间：2025-05-21 修订日期：2025-08-10 |
| DOI：10.6053/j.issn.1001-1412.2025.03.009 |
| 中文关键词: 冀东平原 环境背景值 浅层地下水 Piper三线图 Gibbs图 唐山地区 |
| 英文关键词:Jidong Plain environmental background values shallow groundwater Piper trilinear diagram Gibbs diagram Tangshan area |
| 基金项目:河北省地质资源环境监测与保护重点实验室课题“地下水环境背景值统计与表征关键技术研究——以唐山典型区为例”(JCYKT20230303)、“抽出处理修复污染地下水模拟-优化研究”(JCYKT202105)联合资助。 |
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| 中文摘要: |
| 通过对本次工作采集的522组浅层地下水样品以及收集的749组样品数据进行全面分析，根据冀东平原地形地貌、水文地质、径流特征等，将其浅层水文地质分区细分为8个统计单元，利用数理统计方法求取了12个无机指标的地下水环境背景特征值。利用Piper三线图法、Gibbs图解及离子比例系数方法的结果表明：冲洪积平原水化学类型以HCO3-Ca型为主，水化学特征主要受岩石风化水解作用影响；冲积海积平原水化学类型以Cl-Na型为主，水化学特征主要受蒸发浓缩作用影响。冲积海积平原区SO42-、Cl-、Na+、Ca2+、Mg2+地下水指标背景值明显高于冲洪积平原区，表明冲积海积平原区地下水径流滞缓、弱交替，促进了Na+、Ca2+、Mg2+等碱(土)金属离子以及SO42-、Cl-等强酸离子的富集。以背景值域下限对该研究区进行水质评价，结果显示研究区大部分区域地下水环境背景值呈现良好、优良水平。 |
| 英文摘要: |
| In this study, a comprehensive analysis is conducted on 522 shallow groundwater samples collected during this work and 749 sample datasets obtained. Based on the topography, hydrogeology, and runoff characteristics of the Jidong Plain, the shallow hydrogeological regions are subdivided into eight statistical units. Using mathematical statistical methods, the characteristic values of the environmental background values of groundwater for 12 inorganic indicators are determined. The results obtained by means of the Piper trilinear diagram method, Gibbs diagram, and ion ratio coefficient method indicate that in the alluvial and diluvial plains, the dominant hydrochemical type is HCO3-Ca, primarily influenced by rock weathering and hydrolysis. In the alluvial and marine plains, the dominant hydrochemical type is Cl-Na, mainly affected by evaporation and concentration. The background values of SO2-4, Cl-, Na+, Ca2+, and Mg2+ in the alluvial and marine plains are significantly higher than those in the alluvial and diluvial plains, suggesting that the groundwater in the alluvial and marine plains has slow runoff and weak circulation, which promotes the accumulation of alkali (earth) metal ions such as Na+, Ca2+, and Mg2+, as well as strong acid ions like SO2-4 and Cl-. When evaluating the groundwater quality of the study area using the lower limit of the background value range, the results show that the environmental background values of groundwater in most areas of the study area are in good or excellent condition. |
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