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引用本文:陆莹,王乃昂,李贵鹏,李卓仑,董春雨,路俊伟.巴丹吉林沙漠湖泊水化学空间分布特征.湖泊科学,2010,22(5):774-782. DOI:10.18307/2010.0521
LU Ying,WANG Nai'ang,LI Guipeng,LI Zhuolun,DONG Chunyu,LU Junwei.Spatial distribution of lakes hydro-chemical types in Badain Jaran Desert. J. Lake Sci.2010,22(5):774-782. DOI:10.18307/2010.0521
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巴丹吉林沙漠湖泊水化学空间分布特征
陆莹, 王乃昂, 李贵鹏, 李卓仑, 董春雨, 路俊伟
兰州大学资源环境学院干旱区水循环与水资源研究中心, 兰州 730000
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-、SO42-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.
关键词:  巴丹吉林沙漠  湖泊  水化学
DOI:10.18307/2010.0521
分类号:
基金项目: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
Spatial distribution of lakes hydro-chemical types in Badain Jaran Desert
LU Ying, WANG Nai'ang, LI Guipeng, LI Zhuolun, DONG Chunyu, LU Junwei
College of Earth and Environmental Science, Center for Hydrologic Cycle and Water Resources in Arid Region, Lanzhou University, Lanzhou 730000, P. R. China
Abstract:
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-, SO42-. It formed into three sub-types for different contents of Ca2+ and Mg2+, which attributed to different total dissolved solids. One of the subtype, had high TDS and without Ca2+, Mg2+ 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.
Key words:  Badain Jaran Desert  lake  hydro-chemistry
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