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| 煤炭资源型城市浅层地下水水化学特征与控制因素分析 |
| Analysis of Hydrochemical Characteristics and Controlling Factors of Shallow Groundwater in A Coal Resource based City |
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| DOI: |
| 中文关键词: 浅层地下水 水化学特征 控制因素 Piper三线图 Gibbs图 主成分分析 绝对主成分得分〖CD*2〗多元线性回归模型 大同市 |
| 英文关键词: Shallow groundwater Hydrochemical characteristics Controlling factors Piper trilinear diagram Gibbs diagram Principal component analysis APCS MLR model Datong |
| 基金项目:国家自然科学基金资助项目(12002226);河南省职业教育教学改革研究与实践基金资助项目(02995);河南省高等学校重点科研基金资助项目(24B560004) |
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| 中文摘要: |
| 为了解资源型城市地下水离子的组成及控制因素,以大同市浅层地下水为研究对象,利用Piper三线图、Gibbs图、主成分分析及绝对主成分得分〖CD*2〗多元线性回归受体模型等多种方法,分析地下水水化学特征,并解析离子来源与贡献率。结果表明,大同市浅层地下水pH值范围为653~843,呈弱碱性,水体总硬度(TH)平均值为58764 mg/L,属于极硬水,水中含有Ca2+、Mg2+、SO2-4、Cl-、HCO-3等离子,SO2-4、HCO-3和Ca2+是TDS的主要组成;区域内水化学类型主要为SO4·Cl-Ca·Mg、SO4·Cl-Na、HCO3-Ca·Mg和HCO3-Na·Ca;地下水化学组分受岩石风化作用、阳离子交换作用和人类活动影响;离子主要来源为工矿业生产、水岩相互作用和农业与生活污水,贡献率分别为4023%、2954%和1258%,表明工矿业生产是地下水演化过程的主控因素。 |
| 英文摘要: |
| To investigate the ionic composition of groundwater and identify the controlling factors in resource based cities, shallow groundwater in Datong was selected for analysis. Multiple methods, including Piper trilinear diagram, Gibbs plot, principal component analysis(PCA), and the absolute principal component score multiple linear regression(APCS MLR) receptor model, 〖JP2〗were employed to analyze the hydrochemical characteristics of groundwater and quantify the contributions of ion sources. Results indicated that the pH of shallow groundwater in Datong ranged from 653 to 843, reflecting weakly alkaline conditions. The average total hardness(TH) concentration was 58764 mg/L, classifying the water as extremely hard. The groundwater contained Ca2+, Mg2+, SO2-4, Cl-, and HCO-3. Among these, SO2-4, HCO-3, and Ca2+ constituted the major components of TDS. The predominant hydrochemical types were SO4·Cl Ca·Mg, SO4·Cl Na, HCO3 Ca·Mg, and HCO3 Na·Ca. Groundwater composition was influenced by rock weathering, cation exchange, and anthropogenic influences. Source apportionment revealed that industrial and mining production, water rock interactions, and agricultural/domestic wastewater 〖GK!87mm〗contributed 4023%, 2954%, and 1258%, respectively, indicating that industrial and mining activities were the predominant controlling factor in groundwater evolution. |
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