环鄱阳湖地区地下水pH特征及其控制因素研究  

Study on the pH of Groundwater and Its Controlling Factors in the Poyang Lake Area,Jiangxi

作　　者：薛洋 廖福 王广才[2,3] XUE Yang;LIAO Fu;WANG Guangcai(China Water Industry Investment Co,Ltd,Beijing 100053,China;School of Water Resources and Environment,China University of Geosciences(Beijing),Beijing 100083,China;Key Laboratory of Groundwater Circulation and Environmental Evolution(China University of Geosciences(Beijing)),Ministry of Education,Beijing 100083,China)

机构地区：[1]中国水务投资集团有限公司,北京100053 [2]中国地质大学(北京)水资源与环境学院,北京100083 [3]地下水循环与环境演化教育部重点实验室,北京100083

出　　处：《现代地质》2024年第2期419-426,共8页Geoscience

基　　金：国家自然科学基金重点项目(42030705);国家自然科学基金青年项目(42202272)。

摘　　要：pH是影响地下水组分存在形式的重要水文地球化学指标之一。环鄱阳湖地下水维持着湖泊湿地生态系统,是该地区工农业生产至关重要的水源。目前对鄱阳湖地区地下水pH的研究依然薄弱。本文基于环鄱阳湖地区枯水期与丰水期56个地下水观测点的pH和NO_(3)、Cl、HCO_(3)、SO_(4)、Ca、Mg、Na、K含量等指标,采用多元统计与空间分析方法,分析该地区地下水pH的分布特征及其控制因素。结果表明,环鄱阳湖地区地下水体普遍偏酸性,其中枯水期地下水pH为4.75~8.41,平均值6.43;丰水期地下水pH为4.76~7.43,平均值6.05。丰水期地下水pH普遍低于枯水期,不同水化学类型的地下水pH存在差异,同时pH空间分布也具有区域性特征。控制该地区地下水pH的潜在因素包括酸雨、土壤类型以及碳酸盐岩出露等。本研究成果可为鄱阳湖地区地下水资源管理及污染防治提供一定的理论依据。The pH value is an essential hydrogeochemical parameter affecting the chemical species in the groundwater.The groundwater in the Poyang Lake area is of great importance to the ecosystem of lake and wetland,and is the vital water resource for industrial and agricultural utilizations,however,only there are few stu-dies on the pH of the groundwater in the Poyang Lake aera.Through the investigation of the values of pH,and components of NO_(3),Cl,HCO_(3),SO_(4),Ca,Mg,Na,and K in the collected 56 groundwater samples,we studied the distribution and its controlling factors of the groundwater pH in the Poyang Lake area during both dry and wet seasons using multivariate statistics analysis and spatial analysis.It shows that the groundwater in the Poyang Lake area is slightly acid.The pH of groundwater ranges from 4.75 to 8.41 with an average of 6.43 during the dry season,while ranging from 4.76 to 7.43(average value 6.05)during the wet season.Groundwater pH in the Poyang Lake area presents spatial difference and varies with the hydrogeochemical types.This study infers that the potential effects on the pH of groundwater in the Poyang Lake area are acid rain,soil types,and presence of carbonate rocks.The results in this study will benefit the management of groundwater resources and groundwater pollution prevention in the Poyang Lake area.

关 键 词：鄱阳湖 地下水 PH NO_(3) 控制因素 

分 类 号：P641.3[天文地球—地质矿产勘探] P641.69[天文地球—地质学]