东平湖水化学特征及成因分析  

Analysis on hydrochemical characteristics and causes of Dongping Lake

作　　者：张丽 陈永金[1] 刘加珍[1] 逯尧 刘承志 许婕 贾一灿 吕军生 Li ZHANG;Yongjin CHEN;Jiazhen LIU;Yao LU;Chengzhi LIU;Jie XU;Yican JIA;Junsheng LYU(School of Environment and Planning,Liaocheng University,Liaocheng,252059,China)

机构地区：[1]聊城大学环境与规划学院,聊城252059

出　　处：《环境化学》2021年第5期1490-1502,共13页Environmental Chemistry

基　　金：国家科技支撑计划项目(2014BAC15B02);国家级大学生创新训练项目(201810447023,201910447022);聊城大学大学生创新训练项目(cxcy2019y063)资助。

摘　　要：地表水化学参数特征及其成因分析是地表水资源评价与管理的重要组成部分。为研究泰安市东平湖水化学特征及成因,采用空间插值、Piper三线图、Gibbs图以及相关性分析等方法,探讨了研究区不同月份、不同类型东平湖地表水水化学组份特征及影响因素、各离子的来源等问题。结果显示,东平湖湖水属于碱性水体,TDS时空分布差异显著,10月份总体浓度最高,8月份最低;6月湖区TDS含量从湖区东南向西北逐渐递增,10月从湖心向南北两侧逐渐递增。研究区湖水主要水化学类型由SO_(4)-Na→SO_(4)-Na·Ca·Mg→SO_(4)-Ca型转变,该地区地表水的水化学类型易多变;水体中阳离子以Na^(+)为主,Ca^(2+)稍次之,阴离子以SO_(4)^(2−)为主;水体中K^(+)和Na^(+)来源于大气环流所携带的海盐,HCO−3和Mg^(2+)可能来自白云岩等碳酸盐岩或黑云母的风化溶解,SO_(4)^(2−)则主要来源于人类活动,少量来自石膏溶解,Ca^(2+)则来源于钙长石的风化以及石膏的溶解。由此可见,东平湖水体离子组分基本来源于蒸发结晶,部分组分来源于岩石风化,大气降水的输入作用十分微弱。The analysis of chemical parameters and their causes is an important component of the evaluation and management of surface water resources.For the purpose of understanding hydrochemical characteristics and the causes of Dongping Lake,Tai’an City,spatial interpolation,Piper trilinear diagram,Gibbs diagram,linear regression analysis and correlation analysis were used to study the chemical composition characteristics,influencing factors and sources of various ions of Dongping lake surface water in different months and types in the study area.The results showed that dongping lake was an alkaline water body,and the TDS concentration was the highest in October and the lowest in August.The concentration of TDS in the lake area increased gradually from the Southeast to the Northwest in June.However,it increased gradually from the center of the lake to both sides of North and South in October.The main water chemical types of the lake in the study area changed from SO_(4)-Na to SO_(4)-Na·Ca·Mg and SO_(4)-Ca.And the hydrochemical types of the surface water in study area were variable.The major cations in the water were dominated by Na^(+)and followed by Ca^(2+),and the major anions was SO_(4)^(2−).Correlation coefficient indicated that the ions of K^(+)and Na^(+)came from the ocean,HCO−3 and Mg^(2+)probably came from dolomite weathering dissolution of carbonate rocks or biotite,such as for SO_(4)^(2−) mainly came from human activities,a small amount from gypsum dissolution,Ca^(2+)was derived from the weathering and gypsum dissolution of calcium feldspar,The ionic composition of the water body in the study area basically came from evaporation crystallization,and some components came from rock weathering.The input of atmospheric precipitation was very limited.

关 键 词：东平湖 水化学特征 Piper三线图 Gibbs图 

分 类 号：X524[环境科学与工程—环境工程]