河北曲周盐渍土区的地下水化学特征  

CHEMICAL CHARACTERISTICS OF GROUNDWATER IN SALT-AFFECTED SOIL AREA IN QUZHOU, HEBEI

作　　者：李韵珠[1] 陆锦文[1] 吴金绥[2] 

机构地区：[1]中国农业大学资源与环境学院,北京100094 [2]中国农业大学基础科学技术学院,北京100094

出　　处：《土壤学报》2001年第3期341-352,共12页Acta Pedologica Sinica

基　　金：国家"九五"科技攻关项目 (96-0 0 4 -0 1 -1 4 -2 )资助

摘　　要：对河北曲周县盐渍土区浅层地下水的水化学类型、基本化学性质、主要化学组分及其形式和微量元素的状况及分布等化学特征进行了分析和研究。资料表明 ,该区地下水化学类型以Cl-SO4型为主 ,其次为SO4-Cl型。阳离子以Ca2 +为主 ,其次为Na+。各地下水化学类型可用 3种特征指标 ,即rHCO3/r(Cl+SO4)、rSO4/rCl和rNa/r(Ca +Mg) ,加以区分。地下水矿化度平均 3 1 1 gL- 1 ,最高达 1 7gL- 1 。以Cl-SO4和SO4-Cl型的矿化度和离子强度较高。全区钠吸附比较低 ,基本上无钠害问题。饱和指数表明 ,地下水中石膏和硬石膏呈非饱和状态 ,而方解石、霰石呈过饱和状态。除主要游离离子外 ,化学组分形式中CaSO04 、MgSO04 、CaHCO+3 和MgHCO+3 等配合物和配离子的相对浓度较高。地下水中微量元素Cr、Cd和Fe的含量较高 ,应注意其水质问题。除Zn外 ,各微量元素浓度均与矿化度呈极显著 (或显著 )Hydrochemical types and main chemical characteristics of the shallow gr oundwater in salt-affected soil area in Quzhou, Hebei were described and summari zed in this paper. The data showed that the principal hydrochemical types of the groundwater were ClSO 4 and SO 4-Cl. The principal cation was Ca 2+, and the next was Na+. The results also indicated that the mineralization and ioni c strength of the groundwater in that area were high, especially for Cl-SO 4 an d SO 4-Cl types. The mean mineralization of the groundwater was 3.11g?L -1 with the highest reaching 17g?L -1. The SAR was low, so there was no s od ium hazard with the groundwater. The SI data showed that gypsum and anhydrite we re in an unsaturated state, but calcite, aragonite and dolomite were in a super- saturated state in the groundwater. Except the main spices (such as Ca 2+, Mg 2+, Na+, SO 2- 4 etc), the relative concentrations of complexes or complex ions, CaHCO+ 3, MgHCO+ 3, CaSO0 4 and MgSO0 4, were high. Among 11 microelements, the concentrations of Cr, Cd, and Fe in the saline grou ndwater were affecting factors of the groundwater quality, and deserved attentio n. The concentrations of all the microelements under consideration (except Zn) w ere highly related with the mineralization ( M ) of groundwater.

关 键 词：盐渍土区 地下水 水化学类型 水化学特征 化学组分形式 微量元素 河北 

分 类 号：S156.1[农业科学—土壤学] P641.3[农业科学—农业基础科学]