桂江流域河流水化学特征及影响因素

张红波; 何师意; 于奭; 王艳雪; 王玲玲

doi:10.3969/j.issn.1001-4810.2012.04.007

桂江流域河流水化学特征及影响因素

doi: 10.3969/j.issn.1001-4810.2012.04.007

1.
西南大学地理科学学院；中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室
2.
中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室
3.
广西师范大学生命科学学院

基金项目: 中国地质调查局工作项目“中国岩溶碳汇动态评价”(1212011087122)

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出版历程
- 收稿日期: 2012-08-13
- 发布日期: 2012-12-25

Hydrochemical characteristics and influencing factors of the river water in the Guijiang

1.
School of Geographical Sciences, Southwest University；Institute of Karst Geology, CAGS/ Karst Dynamics Laboratory, MLR&GZAR
2.
Institute of Karst Geology, CAGS/ Karst Dynamics Laboratory, MLR&GZAR
3.
College of Life Science, Guangxi Normal University

摘要

摘要: 2012年4月9-16日在桂江流域采集河流水样15个进行分析测试。研究结果表明:(1)桂江河水样品pH值介于6.36~8.46,平均值为7.58;EC范围为18~316μs/cm,平均值为175μs/cm;流域河水SIc平均值为-0.7,其变化受流域碳酸盐岩的分布控制。(2)桂江的水为HCO3-Ca型水,HCO3-和Ca2+平均分别占阴、阳离子的76%和77%,主要来自岩石风化。(3)中游部分河水NO3-和SO42-较高,可能是受工农业等人类活动的影响引起,此外硫酸参与了碳酸盐矿物的溶解。(4)Ca2+、Mg2+和HCO3-总体呈现中游高,上游和下游较低;SO42-和NO3-仅在中游部分受到人类活动影响较多的支流偏高,上下游相对较低且相差不大;Cl-、Na+和K+则呈现出中下游较高,上游较低的特征。
- 桂江流域 /
- 河流 /
- 水化学 /
- 岩溶
Abstract: Chemical characteristics of 15 river water samples from the Guijiang are analyzed in April 9-16, 2012. The results show that:(1) The pH values of the river water average in 7.58 and range from 6.36 to 8.46; EC average in 175 μs/cm and range from 18 to 316 μs/cm; the SIc average in -0.7 and change in accordance with the distribution of carbonate rocks in the basin; (2)The hydrochemistry type belongs to HCO3- Ca, and the average HCO3-and Ca2+ contents, accounting for 76% and 77% of all the anions and cations respectively on average, mainly originate from the weathering of rocks; (3) The values of NO3-and SO42-, possibly being affected by human activities such as agriculture and industry, are a little higher in the middle reaches of the Guijiang river; (4)Because of the influence of carbonate rock, the contents of Ca2+, Mg2+ and HCO3-are higher in the middle reaches and lowerin the upstream and downstream generally. The contents of SO42- and NO3- are higher only in the tributaries that affected by human activities in the middle reaches. The contents of Cl-, Na+ and K+ are higherin the middle and lower reaches, but relatively lower in the upper reaches.
- Guijiang basin /
- rivers /
- hydrochemistry /
- karst

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