干旱区生态环境知识资源中心(Arid): 黑河中游灌区水化学空间变异特征

Arid

	黑河中游灌区水化学空间变异特征
其他题名	Hydrochemical characteristics of the irrigation area in the middle reaches of the Heihe River Basin
	郜银梁 1; 陈军锋 2; 张成才 1; 闫云霞 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2011
卷号	34 期号:4 页码:575-583
中文摘要	黑河中游分布着大型农灌区,是黑河流域人为干预作用最为强烈的区域。综合运用水化学数理统计和水化学类型分析方法,对灌区地表水与地下水的水化学特征进行系统分析,结果表明:(1)黑河中游灌区地表水与地下水主要水化学类型从东南向西北都经过了由HC03￣ -SO42￣型水向SO42￣ HC03￣型水,再向SO42￣CI-型水演化的过程。主要支流山丹河与梨园河水化学特征不同,北山高矿化度水汇入,也部分影响着河流及地下水化学组成。(2)地表水与地下水主要离子沿流程都不断增加,从而引起矿化度的增大。地下水矿化度最小值（小屯灌区292.2 mg/L）和最大值（宣化灌区3 448.3 mg/L）表明了不同的运移规律和补给来源。(3)sO42￣、Na+是决定地下水盐化作用的主要变量,地下水在灌区运移的过程中,主要的水化学作用由溶滤作用为主转变为蒸发浓缩作用为主。
英文摘要	Located in the central part of the Hexi Corridor(37°45 ’ ~42°40’N,97°42’ ~ 102°04’E),the Heihe River watershed is the second largest one in land river watershed in the arid area of northwest China.The exchange of surface water and groundwater takes place two or three times in this area.It is essential to analyze the interaction between groundwater and surface water,so as to use water resources effectively and predict the change in the water environment.Hydrochemical and isotopic methods of water is one of the important ways,so it is necessary to carry out in-depth analysis and research on chemical characteristics of groundwater and surface water for the study area.Spatial variations of hydrochemical types and the hydrochemical characteristics for both surface water and groundwater were explored in the irrigation area of the middle reaches of the Heihe River Basin.Water of the main profile along the Heihe River and its main tributaries Liyuan River and Shandan River was analyzed for pH,TDS and the major ions in the middle reaches from the Yingluo Gorge to the Zhengyi Gorge,and the similarities and differences of water chemistry between the river and its tributaries were set up.Thirty-nine shallow groundwater samples (confined water samples and unconfined water samples)were collected from agricultural irrigation wells and domestic wells for chemical measurement all over the irrigation area of the basin.Some chemical indicators such as pH,TDS,conductivity (EC)and temperature were measured in the field,and main anions and cations were measured in the laboratory of Institute of Geographic Sciences and Natural Resources Research,CAS.As a management and decision tool,the method of geostatistics has been widely applied to study the spatial changes of groundwater geochemical characteristics.So the TDS and pH of the groundwater samples were analyzed using Ordinary Kriging interpolation.Types of hydrochemical features of surface water and groundwater were characterized by Piper diagram to analyze evolution of water chemistry.Using SPSS statistical analysis of the descriptive statistical analysis,correlation analysis and ion ratio analysis of c(Na )/c(Cl ),the hydrogeochemical process was further revealed.The results show that:(1)Hydrochemical type of surface water and groundwater varies from HCO3-- SO42 - ,SO_2- -HCO3- to SO42- - Cl- from the Yingluo Gorge to the Zhengyi Gorge along the river.Hydrochemical characteristics of right tributaries,with higher salinity,are different from that of left tributaries,which could influence the chemical compositions of surface water and groundwater.(2)Major ions content of surface water and groundwater increases along the water,which leads to a increasing of TDS.The difference between minimum TDS (Xiaotun irrigation area,292.2 mg / L)and the maximum TDS (Xuanhua irrigation area,3 448.3 mg / L)shows that there are different water transfer patterns and water supply sources.(3)SO42- and Na are fundamental ions to determine the groundwater salinization.Flowing along the irrigation area in the study area,the main salinization processes change from lixiviation to evaporation.In-depth study will be carried out with the isotopes information.
中文关键词	水化学 ; 离子分析 ; 分异 ; 灌区 ; 黑河
英文关键词	hydrochemistry ion analysis spatial variation irrigation area the Heihe River
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:4271776
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226467
作者单位	1.郑州大学水利与环境学院, 郑州, 河南 450002, 中国; 2.中国科学院地理科学与资源研究所, 陆地水循环及地表过程重点实验室, 北京 100101, 中国
推荐引用方式 GB/T 7714	郜银梁,陈军锋,张成才,等. 黑河中游灌区水化学空间变异特征[J]. 中国科学院地理科学与资源研究所,2011,34(4):575-583.
APA	郜银梁,陈军锋,张成才,&闫云霞.(2011).黑河中游灌区水化学空间变异特征.干旱区地理,34(4),575-583.
MLA	郜银梁,et al."黑河中游灌区水化学空间变异特征".干旱区地理 34.4(2011):575-583.