青海黄鼠湾—何家庄河谷区地下水水化学特征

随着黄鼠湾-何家庄的工业园区发展，周边生态环境受到了影响。地下水作为生态重要组成部分，研究地下水水化学特征对该地区地下水保护和生态建设具有重要意义。因此，本文2019年在黄鼠湾-何家庄河谷区采集29组水样进行检测分析，运用经典统计学、Piper三线图、Gibbs图、主要离子浓度关系图等方法，对地下水特征及成因进行分析。结果表明：(1)优势阳离子为钙(Ca2+)、镁(Mg2+)、钠(Na+)。优势阴离子为碳酸氢(HCO3-)、硫酸根(SO42-)、氯(Cl-)。(2)研究区水化学类型分为三类。HCO3?Cl-Ca?Na?Mg类、HCO3-Mg?Na?Ca类均分布在研究区上游。HCO3?SO4-Mg?Na?Ca类分布于研究区中游与下游。(3)阳离子受蒸发浓缩、岩石风化与离子交换作用影响。阴离子受岩石风化作用影响。研究区Na+、K+、Cl-主要来源于岩盐与硅酸盐的溶解， Ca2+、Mg2+、HCO-3、SO2-4主要来源于碳酸盐、硅酸盐和蒸发岩的溶解。Ca2+、Na+受到阳离子交换作用影响。过高的K+、Na+、SO42-与人类工业活动有关。

Study on the characteristics of groundwater chemistry in Huangshuwan-Hejiazhuang valley region of Qinghai

Industrial parks is distributed in the Huangshuwan-Hejiazhuang, the surrounding ecological environment is affected by the development of the parks. Groundwater is an important component of the ecological environment, it is significant to study the hydro-chemical characteristics of groundwater for groundwater protection and ecological construction. Thus, the conventional chemical components of 29 samples were collected and tested in in Huangshuwan-Hejiazhuang valley region in 2019. Mathematical statistical methods, Piper trilinear graph, Gibbs diagram,main ion concentration graph and other methods were adopted to study the groundwater hydrochemical characteristics and genetic analysis in study area. The result shows that: (1) Ca2+, Mg2+ and Na+ are the dominant cations of groundwater, while HCO3-, SO42- and Cl- are the dominant anions of groundwater. (2) The chemical types of groundwater are organised into three different categories in study area. HCO3?Cl-Ca?Na?Mg and HCO3-Mg?Na?Ca are distributed in the upper reaches of the study area. HCO3?SO4-Mg?Na?Ca is distributed in the middle and lower reaches of the study area. (3) The cations is affected by evaporation, the rocks weathering function and the cation exchange. Anions is affected by the rocks weathering function. Na+, K+ and Cl- of groundwater are derived from the dissolution of silicate and halite, Ca2+, Mg2+, HCO-3 and SO42- are derived from the dissolution of carbonate, silicate and evaporate. Ca2+ and Na+ also affected by the cation exchange. Excessive K+, Na+, SO42- were related to human industrial activities.