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现代地质 ›› 2007, Vol. 21 ›› Issue (4): 613-618.

• 水资源与环境 • 上一篇    下一篇

广西北海市地下水系统水化学特征的分析

张华1,2,周训1,沈晔1,赵亮1,严霞1,吴福3,黎木兰3,李祖行3   

  1. 1中国地质大学 水资源与环境学院,北京100083;2中国地质科学院,北京100037;
    3广西壮族自治区北海地质环境监测站,广西 北海536000
  • 收稿日期:2007-06-26 修回日期:2007-09-10 出版日期:2007-04-20 发布日期:2007-04-20
  • 作者简介:张华,女,硕士,1975年出生,水文地质学专业,从事水文地质方面的科研工作。 Email: zhanghuacgu@cags.net.cn。
  • 基金资助:

    国家自然科学基金项目(40172087,40214009)

Analyses of Hydrochemical Characteristics of the Groundwater System in Beihai, Guangxi

ZHANG Hua1,2, ZHOU Xun1, SHEN Ye1, ZHAO Liang1, YAN Xia1, WU Fu3, LI Mu-lan3, LI Zu-xing3   

  • Received:2007-06-26 Revised:2007-09-10 Online:2007-04-20 Published:2007-04-20

摘要:

对广西北海市近20年的地下水水质监测资料和2002—2003年野外实地取样的测试资料进行分析,并采用Piper图和Q型群分析进行水化学分类,结果表明该地区北部地下水以Ca·Na-HCO3型为主,水化学特征显示地下水化学成分受降雨入渗和溶滤的影响,而南部地下水以Na-Cl或Na·Ca-Cl型为主。北海市天然条件下地下水的矿化度低,pH值低,呈偏酸性。低矿化度的雨水、可溶盐含量极低的含水介质、迅速的水循环以及长期的淋滤作用,导致了北海地区地下水低矿化度的特点。

关键词: 地下水, 水化学, 聚类分析, 滨海含水层, 北海

Abstract:

Hydrochemical monitoring data of about 20 years and chemical analyses of groundwater samples collected in 2002 and 2003 in Beihai are analyzed and classified with methods of hydrochemical diagrams and Q-cluster analysis. The results show that groundwater in the northern part of the study area is mainly of Ca·Na-HCO3 type and the hydrochemical characteristics of groundwater exhibit the effects of infiltration and dissolution of precipitation. Groundwater in the southern area is mainly of Na-Cl or Na·Ca-Cl type and the hydrochemical characteristics of groundwater follow a forward-hydrochemical evolution. Under natural conditions the ground-water in Beihai is characterized by low total dissolved solids(TDS)and low pH. The low TDS of groundwater is attributed to low TDS of rainwater, low contents of soluble salts in the aquifer media, quick water circulation and a long term of dissolution of the groundwater system.

Key words: groundwater, hydrochemistry, cluster analysis, coastal aquifer, Beihai

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