西南地区典型岩溶盆地夏季水文系统水-岩反应及离子特征分析  

Water-Rock Interaction and Ion Characteristics of Summer Hydrologic Systems in Typical Karst Basins

作　　者：朱国锋[1] 张真一[2] 何元庆[1,3] 蒲焘[3] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室/玉龙雪山冰川与环境观测研究站,甘肃兰州730000 [2]兰州商学院图书馆,甘肃兰州730000 [3]兰州大学资源环境学院,甘肃兰州730000

出　　处：《水土保持通报》2011年第6期21-25,共5页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目"典型温冰川流域水文径流变化对区域水资源的影响"(40971019);国家自然科学基金项目(40801028);中国科学院"西部之光"人才培养计划(O828A11001);国家重点基础研究发展(973)计划(2007CB411501)

摘　　要：收集了横断山区丽江盆地2005年7月22至7月28日部分水体可溶性离子数据,运用主成分和相关分析等方法,对我国横断山区丽江盆地7个代表性水体进行了化学离子分析。分析结果表明,水体中的阳离子主要以Ca2+和Mg2+为主,阴离子中SO42-为优势阴离子。主成分分析法分析结果表明,岩石岩性对丽江盆地的水体可溶性常规离子构成具有决定性影响,人类活动对水体离子构成具有较强影响。相关性分析表明Na+,K+,Mg2+,Ca2+浓度与岩石的岩性高度相关,Cl-和NO3-浓度与人类活动呈正相关关系。Ca2+与Mg2+相关性很强,说明Ca2+与Mg2+有很强的同源性,进一步分析表明这与SO24-的化合物H2SO4参与并加速碳酸盐矿物和硫酸盐矿物的溶解有关;SO42-,Ca2+,Mg2+,K+,Na+之间存在较强的相关性。Cl-与NO3-具有较好的相关性,这两种离子与人类活动有关,说明Cl-与NO3-有近似的来源且大部分来源于人类活动。Different typical water samples were collected from July 22 to July 28 in 2005 in Lijiang Basin of the Hengduan Mountainous Region for chemical characteristics study.Principal component analysis（PCA） and correlation analysis were used for data analysis,the results showed that the dominant cations were Ca2＋ and Mg2＋,whereas SO-24 were major anions.The analytical results suggested that the orders of water concentration,from high to low,were the glacial lake water,melt water runoff,lake water,surface runoff and groundwater.PCA results showed the lithological characters definitively influenced the ion content of water in the Lijiang basin,which also were effected by human activities.Correlation analysis showed that the concentration of Na＋,K＋,Mg2＋,Ca2＋ highly correlated with the lithology,whereas Cl-,and NO-3 concentration had a positive correlation with human activities.High correlation between Ca2＋ and Mg2＋ suggested their strong common source.Further analysis shows that H2SO4 participating in and accelerating the carbonate and sulfate mineral dissolution related to the above.Cl-and NO-3 with strong correlation were closely related to human activities indicating Cl-and NO-3 have similar sources of which most come from human activities.

关 键 词：丽江盆地 可溶性离子 主成分分析法 相关分析法 物质迁移 

分 类 号：P342[天文地球—水文科学] X532[天文地球—地球物理学]