祁连山东端地表及地下水水化学时空变化特征

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摘要

于2016~2017年5~9月采集祁连山东端（乌鞘岭、古浪、天祝）的地表水和地下水样品进行水化学分析，综合运用统计分析、Piper三线图、Gibbs图以及离子比值等方法探究了祁连山东端地表水和地下水主要离子组成特征、来源以及时空变化.结果表明，祁连山东端地表水和地下水化学组成中优势阳离子为Ca²⁺和Na⁺，Ca²⁺的平均浓度为76.897mg/L，占比73.89%；Na⁺的浓度为16.592mg/L，占比15.94%.优势阴离子为HCO₃^-和SO₄^2-，HCO₃^-浓度190.117mg/L，占比68.71%；其次是SO₄^2-，平均值为67.565mg/L，占比为24.42%.乌鞘岭河水、地下水，天祝河水、地下水的水化学类型为HCO₃^--Ca²⁺型，古浪河水、地下水水化学类型为HCO₃^--Ca²⁺-Mg²⁺型，处于水化学易变区.不同水体离子来源于岩石风化，主要受碳酸盐与硅酸盐风化溶解共同作用控制，人类活动在一定程度上贡献了水体的离子来源.不同水体主要离子浓度的时间变化特征各不相同，整体上大部分水体的离子浓度随时间变化不明显，总体趋势较平缓.

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	曹晏风
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	瞿德业
	王圣杰
	邱雪
	马转转
	杜勤勤
	车存伟

关键词 ：水化学, 离子来源, 时空变化, 祁连山东端

Abstract：

Surface water and undergroundwater were collected from the eastern part of Qilian Mountains (Wushaoling, Gulang, Tianzhu) from May to September, 2016~2017. Water chemical analysis, statistical analysis, Piper three-line diagram, Gibbs diagram and ion ratio were used to explore the main ion composition, source and temporal & spatial variation of surface water and undergroundwater in the area. The result shows that the main cations of theeastern part of the surface water and undergroundwater in Qilian Mountainsare Ca²⁺ and Na⁺. The average concentration of Ca²⁺ is 76.897mg/L, accounting for 73.89%.AndNa⁺ is 16.592mg/L, accounting for 15.94%. The dominant anions are HCO₃^- and SO₄^2-. The concentration of HCO₃^- is 190.117mg/L, accounting for 68.71%. SO₄^2- is 67.565mg/L, accounting for 24.42%. The water hydrochemistry type is HCO₃^--Ca²⁺ concerning Wushaoling River water, Wushaoling undergroundwater, Tianzhu riverand Tianzhuunderground water.In the light of Gulangriver water and its underground water, the type is HCO₃^--Ca²⁺-Mg²⁺. Ions ofdifferent waters are from rock weathering, meanwhile affected by carbonate and silicate weathering and dissolution combined, and human activity is alsocontributed. The time-varying characteristics of the main ions concentration in different water bodies are different.In general, the ions concentration of most water bodies does not change significantly with time, and the overall trend is relatively flat.

Key words： water chemistry ion source temporal-spatial variation the eastern part of Qilian Mountains

收稿日期: 2019-09-09

PACS:

X523

基金资助:

国家自然科学基金资助项目（41461003，41771035）

通讯作者: 张明军,教授,mjzhang@163.com E-mail: mjzhang@163.com

作者简介: 曹晏风(1994-),女,甘肃定西人,硕士研究生,主要从事寒旱区生态水文过程研究.

引用本文:

曹晏风, 张明军, 瞿德业, 王圣杰, 邱雪, 马转转, 杜勤勤, 车存伟. 祁连山东端地表及地下水水化学时空变化特征[J]. 中国环境科学, 2020, 40(4): 1667-1676. CAO Yan-feng, ZHANG Ming-jun, QU De-ye, WANG Sheng-jie, QIU Xue, MA Zhuan-zhuan, DU Qin-qin, CHE Cun-wei. Temporal-spatial variation of surface and undergroundwater chemistry in the eastern part of Qilian Mountains. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(4): 1667-1676.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2020/V40/I4/1667

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