雷州半岛地下水化学特征及控制因素分析  

Hydrochemical Characteristics and Controlling Factors of Groundwater in the Leizhou Peninsula

作　　者：彭红霞[1] 侯清芹 曾敏[2] 黄长生[2] 师环环 皮鹏程 潘羽杰 PENG Hong-xia;HOU Qing-qin;ZENG Min;HUANG Chang-sheng;SHI Huan-huan;PI Peng-cheng;PAN Yu-jie(School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China;Wuhan Center of China Geological Survey,Wuhan 430205,China)

机构地区：[1]中国地质大学(武汉)地理与信息工程学院,武汉430074 [2]中国地质调查局武汉地质调查中心,武汉430205

出　　处：《环境科学》2021年第11期5375-5383,共9页Environmental Science

基　　金：国家自然科学基金项目(41877297);中国地质调查局项目(12120114029601)。

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HCO^(-)_(3)、Ca^(2+)和Na^(+)为主,水化学类型以HCO_(3)-Cl^(-)Na-Ca、HCO_(3)-Cl^(-)Na-Ca-Mg、HCO_(3)-Cl^(-)Na-Mg和HCO_(3)-Na型为主.研究区地下水中的Cl^(-)、SO_(4)^(2-)和Na+在雷州市西部含量较高,在其他区域均较低,HCO^(-)_(3)、NO^(-)_(3)、Ca^(2+)、Mg^(2+)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,Ca^(2+)和Mg^(2+)主要来源于碳酸盐岩溶解,NO^(-)_(3)主要来源于人类活动.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:①The anions and cations of the groundwater in the study area were mainly HCO^(-)_(3),Ca^(2+),and Na_(+),and the hydrochemical types were mainly HCO_(3)-Cl^(-)Na-Ca,HCO_(3)-Cl^(-)Na-Ca-Mg,HCO_(3)-Cl^(-)Na-Mg,and HCO_(3)-Na.The contents of Cl^(-),SO_(4)^(2-),and Na_(+)were higher in the west of Leizhou City compared to other areas.The sites with higher contents of HCO^(-)_(3),NO^(-)_(3),Ca^(2+),Mg^(2+),and K+were mainly concentrated in the southwest and eastern coastal areas.②The 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,Ca^(2+)and Mg^(2+)were mainly from carbonate karstification,while NO^(-)_(3)originated from anthropogenic activities.

关 键 词：地下水 水化学特征 控制因素 形成机制 雷州半岛 

分 类 号：X523[环境科学与工程—环境工程]