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青海布哈河丰水期水化学特征

李宗杰,宋玲玲,田青*   

  1. (甘肃农业大学林学院, 兰州 730070)
  • 出版日期:2017-03-10 发布日期:2017-03-10

Water chemical characteristics in the wet season in Buha River Basin in Qinghai.

LI Zong-jie, SONG Ling-ling, TIAN Qing*#br#   

  1. (College of Forestry, Gansu Agricultural University, Lanzhou 730070, China).
  • Online:2017-03-10 Published:2017-03-10

摘要:

运用相关分析、因子分析和富集因子等对布哈河流域2014年丰水期河水样品主要离子浓度特征及来源进行了分析。结果表明:布哈河流域河水pH值的变化范围为7.91~9.21,平均值为8.43;EC的变化范围为133~871 μS·cm-1,平均值为383 μS·cm-1;河水中SO42-、Ca2+、Cl-、Na+、Mg2+、NO3-、K+和NH4+的平均离子浓度分别为60.2、33.1、31.1、14.8、12.8、8.1、1.5和0.3 μeq·L-1;阳离子浓度的大小顺序为Ca2+>Na+>Mg2+>K+>NH4+,而主要阴离子浓度的大小顺序SO42->Cl->NO3-;Mg2+、Ca2+和SO42-的离子浓度随着海拔的增加呈增加的趋势,Na+、Cl-和NO3-随着海拔的增加表现出减小的趋势,但K+和NH4+不随海拔梯度的改变而变化;布哈河全流域的水化学类型为SO42--Ca2+-Cl--Mg2+;布哈河流域的水化学主要受控于蒸发岩和碳酸盐岩风化产物的影响。
 

关键词: 稳定同位素, 食物网, 大连海域, 营养级

Abstract: This paper reported the hydrochemical characteristics and possible source through the correlation analysis, factor analysis and enrichment factor in the Buha River Basin in wet season in 2014. The results showed that the pH of river water in Buha River Basin ranged between 7.91 and 9.21, with an average of 8.43. The EC ranged from 133 to 871 μS·cm-1, with an average of 383 μS·cm-1. The average ionic concentrations for SO42-, Ca2+, Cl-, Na+, Mg2+, NO3-, K+ and NH4+ were 60.2, 33.1, 31.1, 14.8, 12.8, 8.1, 1.5 and 0.3 μeq·L-1. The ionic abundance of river water in Buha River Basin followed the sequence of Ca2+> Na+> Mg2+> K+> NH4+ for cations, and SO42->Cl->NO3- for anions. The concentrations of Mg2+, Ca2+ and SO42- increased with the increase of altitude, whereas the concentrations of Na+, Cl- and NO3- decreased. The concentrations of K+ and NH4+ showed no change along the altitude. The chemical type for river water was SO42--Ca2+-Cl--Mg2+ type. The water chemistry of Buha River Basin was mainly controlled by evaporates and carbonates weathering products.

Key words: stable isotope, trophic level, Dalian marine area, food web.