| 雷州半岛地下水化学特征及控制因素分析 |
| 摘要点击 2152 全文点击 731 投稿时间：2021-04-08 修订日期：2021-04-29 |
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| 中文关键词 地下水 水化学特征 控制因素 形成机制 雷州半岛 |
| 英文关键词 groundwater hydrochemical characteristics controlling factors formation mechanism Leizhou Peninsula |
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| 中文摘要 |
| 雷州半岛地下水资源为雷州半岛经济社会发展提供有力的资源支撑，厘清该区地下水化学特征及形成机制对水资源的合理开采及可持续利用具有重要意义.本研究采集43组雷州半岛地下水样品，运用描述性统计分析、Piper三线图、ArcGIS空间插值、Gibbs图以及离子比值等方法分析地下水水化学特征及其控制因素.结果表明：①研究区地下水阴阳离子以HCO3-、Ca2+和Na+为主，水化学类型以HCO3-Cl-Na-Ca、HCO3-Cl-Na-Ca-Mg、HCO3-Cl-Na-Mg和HCO3-Na型为主.研究区地下水中的Cl-、SO42-和Na+在雷州市西部含量较高，在其他区域均较低，HCO3-、NO3-、Ca2+、Mg2+和K+这5种离子含量较高的区域主要集中在西南和东部沿海.②地下水化学演化过程主要受水岩作用、阳离子交替吸附和人类活动的影响.Na+和K+来源主要是蒸发盐岩和硅酸盐岩，Ca2+和Mg2+主要来源于碳酸盐岩溶解，NO3-主要来源于人类活动. |
| 英文摘要 |
| Groundwater resources in the Leizhou Peninsula provide a strong support for the economic and social development. Therefore, understanding the chemical characteristics and formation mechanism of groundwater in this area is necessary for the rational exploitation and sustainable utilization of water resources. In this study, 43 groundwater samples were collected, and the hydrochemical characteristics and controlling factors were analyzed by descriptive statistical analysis, Piper triangular diagrams, ArcGIS spatial interpolation, Gibbs diagram, and ion ratios. The results showed that:① The anions and cations of the groundwater in the study area were mainly HCO3-, Ca2+, and Na+, and the hydrochemical types were mainly HCO3-Cl-Na-Ca, HCO3-Cl-Na-Ca-Mg, HCO3-Cl-Na-Mg, and HCO3-Na. The contents of Cl-, SO42-, and Na+were higher in the west of Leizhou City compared to other areas. The sites with higher contents of HCO3-, NO3-, Ca2+, Mg2+, and K+ were mainly concentrated in the southwest and eastern coastal areas. ② The chemical evolution of groundwater was mainly affected by water-rock interaction, cation alternating adsorption, and anthropogenic activities. The sources of Na+ and K+ were mainly from evaporative and silicate rocks, Ca2+ and Mg2+ were mainly from carbonate karstification, while NO3- originated from anthropogenic activities. |
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