农业工程学报Issue(21)：99-110,12.DOI:10.3969/j.issn.1002-6819.2014.21.013
节水改造前后内蒙古河套灌区地下水水化学特征
Hydrochemical characteristics of groundwater before and after water-saving reform in Hetao Irrigation District, Inner Mongolia
摘要
Abstract
The purpose of the research is to validate the water environment changes of regional soil after implementing the water-saving upgrading program. The background of this research is about program implementation of water-saving upgrading in North irrigation district. The groundwater samples were analyzed scientifically and systemically in Inner Mongolia Hetao irrigation district, then the descriptive statistics, the correlation matrices, the ratio coefficient of the main ions and the graphical method (including the H.И. diagram, the piper diagram and Multi-rectangular diagram) were utilized to gain the better understanding of the spatial-temporal variability of the characteristics and the evolution rule of groundwater hydrochemistry in Hetao irrigation district of Inner Mongolia. The results showed that evaporation concentration, lixiviation and cation exchange were the main hydrological chemical processes which controlled the evolution of groundwater quality in irrigation district. Compare with the 2007 (before water-saving upgrading), the absolute content of HCO3- has change from smallest to largest in anion which becoming the main anion in the groundwater on 2008 and 2009. Coefficient of variation of Ca2+、Mg2+、HCO3-had few change and kept in a stable content in the groundwater. In addition, coefficient of variation of Na+、Cl-、SO42-had a large change in the groundwater. As a result, Na+、Cl-、SO42- became a susceptibility factor varying with environmental factors and major variables that determined in groundwater salinization effect. The main chemical types of ground water were HCO3-Na (middle and lower reaches), SO4-Na (downstream) and Cl-Na (upstream) in irrigation district. Moreover, compared with the 2007, the concentration of HCO3- was increasing, but the concentration of Cl- and Na+ were decreasing. The groundwater was changing to more desalt water and small harm for crop. There was a complex spatiotemporal variation of chemical types for ground water. To follow the direction of groundwater flow, the chemical types of groundwater had been changed from Na-Ca-Mg-Cl-SO4-HCO3, Na-Mg-Cl-SO4-HCO3 and Na-Mg-Ca-HCO3-SO4-Cl to Na-Cl-SO4, Na-SO4-HCO3 and Na-Mg-Cl-HCO3. Furthermore, the chemical types of groundwater had been changed from Ca-Na-Mg-HCO3-SO4-Cl, Na-Mg-Ca-HCO3-SO4-Cl and Na-Mg-Cl-HCO3-SO4 to Na-Cl-HCO3-SO4, Na-HCO3-Cl-SO4 and Na-Ca-HCO3-SO4-Cl in 2008. In 2009 the chemical types of groundwater had been changed from Na-Ca-Cl-SO4-HCO3, Na-Mg-Ca-HCO3-SO4-Cl and Na-Mg-Ca-Cl-HCO3-SO4 to Na-HCO3-Cl-SO4, Na-Cl-SO4 and Na-Ca-Mg-Cl-SO4-HCO3. The Na+had absolute predominance trend. Therefore, in chemical type aspect, HCO3- of anion in 2008 and 2009 was more primary chemical type than HCO3-of anion in 2007. The research results can give the references to evaluate the impacts of the water-saving upgrading program on water environment of regional soil.关键词
地下水/水质/节水/节水改造/水化学/时空变异/演变规律/内蒙古河套灌区Key words
groundwater/water quality/water conservation/upgrading of water-saving facilities/hydrochemistry/spatial-temporal variability/evolvement rule/Inner Mongolia Hetao irrigation district分类
天文与地球科学引用本文复制引用
李彬,史海滨,张建国,李祯..节水改造前后内蒙古河套灌区地下水水化学特征[J].农业工程学报,2014,(21):99-110,12.基金项目
国家“十二五”科技支撑计划项目 （）
国家自然科学基金项目（51269015）；内蒙古科技攻关与政府专项科研项目 （）
