地学前缘 ›› 2008, Vol. 15 ›› Issue (5): 74-81.

• 论文 • 上一篇    下一篇

成都经济区天降水与下渗水元素地球化学特征及土壤元素输入输出通量

  

  1. 中国地质大学（北京） 地球科学与资源学院， 北京 100083

  • 出版日期:2008-05-02 发布日期:2008-05-02
  • 作者简介:刘东盛（1985—），男，硕士研究生，地球化学专业。Email:dopsonliu@126.com
  • 基金资助:

    中国地质调查局国土资源调查项目（GZTR20060201，GZTR20070201，GZTR0201）

Geochemical characteristics and fluxes of　elements in rain water and soil leaching water in the Chengdu economic region

  1. School of Earth Sciences and　Resources, China University of Geosciences(Beijing), Beijing 100083, China

  • Online:2008-05-02 Published:2008-05-02

PDF (PC)

802

摘要：

论文研究了成都经济区天降水和下渗水中元素含量、在农田耕层中的输入输出通量及其影响因素。

研究表明，研究区雨水中含有大量SO2-4、NO-3等酸性物质，雨水中SO2-4 >NO-3>Cl-。雨水中Ca2+和NH+4

含量最高，且NH+4>Ca2+>K+>Na+>Mg2+。雨水的pH与阴、阳离子摩尔浓度差值具有显著相关性。下渗水中

以Ca2+为主要阳离子，且Ca2+>Na+>Mg2+>K+>NH+4；HCO-3为主要阴离子，且HCO-3>NO-3>SO2-4>Cl->F-，

下渗水pH与阳、阴离子摩尔浓度差值具有显著相关性。不同地区雨水中Pb>As>Cd>Se>Hg，下渗水中

Pb>As>Se>Cd>Hg，因此，Cd、Pb、Se和Hg等元素累积在耕层中，而As则被下渗水携带迁移出耕层进入地下

水。由降雨输入土壤中的Cd通量均大于下渗水输出Cd的通量，局部地区As下渗通量高于雨水输入通量的5

45~1316倍。土壤中元素的下渗比与土壤质地、pH有关。

关键词: 天降水;下渗水;输入输出通量;成都经济区

Abstract:

 In this paper, we have studied the element contents in rain water and soil

leaching water, the output and input flux of farmland tilth and its influencing factors in

the Chengdu economic region The results show that the rain water in the study area

contains a lot of acidic material such as SO2-4, NO-3, etc, and SO2-4>NO-3>Cl- by

concentration The concentrations of Ca2+ and NH+4 are the highest, and NH+4>Ca2+>

K+>Na+>Mg2+ in the rain water The pH of the rain water and the difference between anion

and cation molar concentration are significantly correlated By concentration,

Pb>As>Cd>Se>Hg in the rain water and Pb>As>Se>Cd>Hg in leaching water in different areas; as

a result, the element of Cd, Pb, Se, Hg, etc are accumulated in tilth layer, and As was

carried out from tilth layer into the underground by leaching The Cd flux in the soil from

the rain water is more than that from leaching; the leaching flux of As is 545 to 1316

times higher than the flux from the rain water in some parts of the area The leaching

ratio of tilth elements is related to soil texture and pH value.

Key words:

Key words: rain water; leaching water; fluxes; the Chengdu economic area

中图分类号: