地学前缘 ›› 2012, Vol. 19 ›› Issue (1): 264-277.

• 论文 • 上一篇    下一篇

鄱阳湖流域水化学特征及影响因素分析

翟大兴, 杨忠芳, 柳青青, 夏学齐, 侯青叶, 余涛, 袁国礼, 冯海艳   

  1. 1. 中国地质大学（北京） 地球科学与资源学院， 北京 100083
    2. 浙江省地质调查院， 浙江 杭州 311203
  • 收稿日期:2010-06-23 修回日期:2011-01-17 出版日期:2012-01-10 发布日期:2012-01-10
  • 作者简介:翟大兴（1983—），男，硕士，地球化学专业。E-mail：weinyuan@163.com
  • 基金资助:

    国土资源部公益性行业科研专项基金（200911020）；中国地质调查局地质调查工作项目（1212011087125）

Major ion chemistry and influencing factors of rivers in Poyang Lake Basin.

  1. 1. School of Earth Sciences and Resources， China University of Geosciences (Beijing)， Beijing 100083， China
    2. Zhejiang Institute of Geological Survey， Hangzhou 311203， China
  • Received:2010-06-23 Revised:2011-01-17 Online:2012-01-10 Published:2012-01-10

PDF (PC)

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摘要：

在地球表生系统中，化学风化作用强烈改变着岩石、水体、土壤和大气成分，是元素地球化学循环的最主要驱动力。河水溶解物质主要来源于流域内岩石化学风化，同时受到降水、人类活动的影响。文中通过对鄱阳湖流域河水样品的采集和化学成分分析，结合流域地质背景，研究了河水化学成分特征及其影响因素。结果显示，与20世纪80年代相比，本区河水Cl-、SO2-4所占比例显著增高，有逐渐酸化趋势；与世界上其他主要河流相比较，该区Ca2+/Na+、Mg2+/Na+、HCO-3/Na+等比值偏低，反映了较强的蒸发岩溶解及人类活动影响特征。该区河水离子特征主要由岩石风化所控制，降水对该区河水溶解物质贡献率为10.3%，农业生产活动对鄱阳湖水溶解物质贡献率为4.9%，矿山活动对饶河丰水期、枯水期离子总量贡献率分别为8.9%、14.6%。

关键词: 溶解物质总量, 主要离子, 化学风化, 鄱阳湖流域

Abstract:

In the hypergene earth system, the chemical weathering is the predominant driving force of a chemical cycle and it affects the compositions of rock, water, soil and atmosphere greatly. Dissolved materials mainly derived from chemical weathering of rocks in river basin, with the combinations of precipitation and the impact of human activities. In this work, the characteristics of chemical compositions of the rivers in Poyang Lake drainage basin and their influencing factors are studied based on the systematic sample collections and chemical composition analysis of river water samples from this area. The results indicate that the Cl-, SO2-4 ion of river water have significantly increased and gradually acidified in the study area in comparison with those in the eighties of the last century. Compared with other main rivers worldwide, the ratios of Ca2+/Na+, Mg2+/Na+, HCO-3/Na+ are lower, which reveal the influences of strong evaporite weathering and human activities. The compositional ionic characteristics of the river water were mainly controlled by rock weathering in the study area, whereas the contribution ratio of precipitation is 10.3% and agricultural activities is 4.9%. The contribution of mining activities to Raohe river ions is 8.9% in wet period while 14.6% in dry season.

Key words: total dissolved solids, major ions, chemical weathering, Poyang Lake Basin

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