摘要
安宁河河谷地区是四川省第二大粮仓,区内人口较多、矿业发达。查明流域水化学特征及物质来源,对于探讨地质背景与人为活动对河流水化学特征的影响具有重要意义。研究显示,安宁河河水整体偏弱碱性,p H均值为8.18,TDS值高于世界河流平均值。河水中阳离子浓度平均值顺序为Ca^2+>Na^+>Mg^2+>K^+,阴离子浓度平均值顺序为HCO3^->Cl^->SO4^2->NO3^-。空间上,自上游至下游,安宁河河水的TDS值和阴阳离子含量呈整体上升的趋势,SO4^2-、NO3^-浓度波动较大。控制流域水化学特征的主要因素是硅酸盐岩的风化,其次是碳酸盐岩的风化。流域内的NO3^-主要来源于农业活动和土壤有机氮,矿业活动对安宁河河水中SO4^2-浓度的影响较大,人为活动对安宁河流域水化学的影响不可忽视。
The Anning River valley,with densely population and developed mining industries,is the second largest granary in Sichuan Province.It is of great significance to investigate the influence of geological background and human activities on the chemistry and substance provenance of river water.The study shows that the Anning River is weakly alkaline,with a mean p H of 8.18.The TDS value is higher than the world average.The sequence of cation concentration in water is Ca^2+>Na^+>Mg^2+>K^+,and the order of mean anion concentration is HCO3^->Cl^->SO4^2->NO3^-.TDS,cation and anion ions increases from the upstream to the downstream,and concentrations of SO4^2-and NO3^-fluctuate greatly.Chemical weathering of silicate and carbonate rocks are the primary factors that control the cheracteristics of the water.NO3^-in the basin is mainly derived from agricultural activities and soil organic nitrogen.Mining activities have a great influence on the concentration of SO4^2-in the Anning River,and the influence of human activities on the hydrochemistry of the Anning River basin cannot be ignored.
作者
廖程
施泽明
王德伟
章凤英
徐文斌
唐亮
LIAO Cheng;SHI Zeming;WANG Dewei;ZHANG Fengying;XU Wenbin;TANG Liang(College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;Chengdu Geological Survey Center,China Geological Survey,Chengdu 610081,China;Applied Nuclear Techniques in Geosciences Key Laboratory of Sichuan Province,Chengdu University of Technology,Chengdu 610059,China)
出处
《地球与环境》
CAS
CSCD
北大核心
2020年第6期680-688,共9页
Earth and Environment
基金
中国地质调查局城市地质调查项目(21800-DC0024)
成都市典型地区地下空间综合评价项目(DD20189210-20)。
关键词
安宁河流域
水化学
岩石风化
人类活动
Anning river basin
water chemistry
rock weathering
human activities
