论文部分内容阅读
在野外水文地质调查工作基础上,对伊犁河谷潜水进行取样分析测试,采用Arc GIS空间分析功能,piper三线图,Gibbs图等方法,重点对两条典型剖面的地下水化学特征及其成因进行了分析。结果表明:1)区域水化学组分阳离子以Ca~(2+)、Mg~(2+)为主,阴离子以HCO_3-、SO_42-为主。水化学类型以HCO_3-Ca、HCO_3-Ca·Mg、HCO_3·SO_4-Ca以及HCO_3·SO_4-Ca·Mg型为主,TDS以<1g/L为主,水质优良。2)“1号剖面”主要阴、阳离子自北向南呈现同步变化规律,自北向南水化学类型依次为HCO_3-Ca、HCO_3·SO_4-Ca·Mg、HCO_3·SO_4-Ca·Na。“2号剖面”由东向西水化学类型依次为HCO_3-Ca·Mg、HCO_3·SO_4-Ca·Mg、HCO_3·SO_4-Ca·Na。地下水化学类型与所处地貌单元紧密相关。3)研究区地下水水化学特征的形成与岩石溶虑作用、蒸发浓缩作用、混合作用等密不可分,但以岩石溶虑作用为主。人类活动对研究区地下水化学组分产生的影响较小。
On the basis of the field hydrogeological survey, sampling and analyzing the Ili Valley submarine, using ArcGIS spatial analysis function, piper three-line diagram and Gibbs diagram, the groundwater chemistry characteristics and their causes of two typical sections are analyzed emphatically . The results show that: 1) the cations of chemical components in the water are mainly Ca2 + and Mg2 +, and the anions are mainly HCO3- and SO42-. The hydrochemical types are mainly HCO 3-Ca, HCO 3 -Ca · Mg, HCO 3 · SO 4 -Ca and HCO 3 · SO 4 -Ca · Mg, TDS is less than 1 g / L and the water quality is good. 2) The main anion and cation of the “No.1” profile show synchronous variation from north to south. The chemical types from north to south are HCO_3-Ca, HCO_3 · SO_4-Ca · Mg and HCO_3 · SO_4-Ca · Na. “No. 2 profile ” from east to west water chemical types were HCO_3-Ca.Mg, HCO_3.S04-Ca.Mg, HCO_3.S04-Ca-Na. The type of groundwater chemistry is closely related to the geomorphic unit in which it is located. 3) The formation of hydrochemical characteristics of groundwater in the study area is closely related to the dissolution of rocks, evaporation and concentration, and mixing, but it is mainly based on the dissolution of rocks. Human activities have less impact on groundwater chemical composition in the study area.