摘要
通过对巴丹吉林沙漠腹地拐子湖-地质公园一线51个湖泊水,8个泉水,12个井水及1个雨水水样的水化学成分分析,初步探讨了沙漠湖泊水化学分布特征及其影响因素.结果表明由东南边缘至腹地湖泊总体上依次呈硫酸盐型-碳酸盐型-氯化物型分布.东南边缘以Na+、Cl-、SO24-为主的湖泊因矿化度分异,形成Ca2+、Mg2+含量不同的三种亚型,其中高矿化度的Na-Cl-(SO4)型湖泊在腹地湖泊群中也有出现,表现出地理上的不连续分布;边缘若干湖泊受局部地理环境的影响水离子多含Na+、Cl-、CO32-+HCO3-.综合分析表明湖泊水化学型的空间分异与区域气候差异和气候变化有关,湖水直接或间接地接受当地降水补给,但不排除外源地下水补给对其有一定贡献.通过对比不同时段部分沙漠湖泊水化学特征发现近十年以来腹地湖泊补给源或受气候干暖化影响使其水化学特性较边缘湖泊的变化大.
In September,2009,51 samples of lakes as well as 8 of springs and 12 of wells were studies from Lake Guaizi Geological Park in Badain Jaran Desert.The result demonstrated that almost all lakes from southeast edge to hinterland area showed Sulfate-Carbonate-Chloride type.The southeast edge has the most complex type,mainly contained Na^＋,Cl^-,SO4^2-.It formed into three sub-types for different contents of Ca^2＋and Mg^2＋,which attributed to different total dissolved solids.One of the sub-type,had high TDS and without Ca^2＋,Mg^2＋ also appeared in north,which seemed to be one type just non-sequential distribution,however,they had huge differences.After a comprehensive analysis,it showed that spatial variation of desert lakes mainly formed by climate,and partly by local precipitation directly or indirectly,and groundwater recharge may be other factor.Compared characteristics of water chemistry among the different part of south and north lake,it showed that the supply source of the hinterland was more unstable than that of southeast,which might be drived by climate drying and warming.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2010年第5期774-782,共9页
Journal of Lake Sciences
基金
国家基础科学人才培养基金项目(J0730536)
高等学校博士学科点专项科研基金项目(20090211110025)联合资助
关键词
巴丹吉林沙漠
湖泊
水化学
Badain Jaran Desert
lake
hydro-chemistry
