干旱区生态环境知识资源中心(Arid): 额济纳盆地地下水盐化特征及机理分析

Arid

	额济纳盆地地下水盐化特征及机理分析
其他题名	Groundwater Salinization Characteristics and Mechanism in Ejin Basin
	温小虎 1; 仵彦卿 1; 苏建平 2; 张应华 2; 刘发民 2
ISSN	1000-694X
出版年	2006
卷号	26 期号:5 页码:836-841
中文摘要	运用水文地球化学方法,分析额济纳盆地不同含水层地下水盐化特征及其机理.结果表明:额济纳盆地地下水受水文地质条件的制约,潜水的盐化自沿河主要补给区到蒸发排泄区具有明显的分带性,由河流主要补给区向北和向东西两侧,至居延海,进素土海子和古日乃湖中心洼地地下水,地下水由淡水,逐渐过渡为微咸水、中度咸水及极度咸水、盐水;承压水属于微咸水.依据地下水中各离子含量的比值特征的分析结果,控制本区地下水盐化的主要因素为硅酸盐矿物溶解和蒸发-沉积作用,硅酸盐矿物溶解主要发生在沿河的地下水补给区;蒸发-沉积作用主要发生在地下水径流-排泄区.深层地下水埋藏较深,蒸发的作用大大减弱,因而含盐量少,水质较好.
英文摘要	Salinization is the most widespread form of water contamination. The areas affected by salinization are mainly located in arid and semi-arid regions. Studying the groundwater salinization can help people recognize the evolution of groundwater environment and make a rational use of the groundwater resource. In this study, with groundwater samples collected from different aquifers in lower reaches of Heihe River, we studied the salinization characteristics and mechanisms of groundwater in the Ejin basin by use of the hydro-geological method. The shallow groundwater salinization within the area from recharge area to discharge area showed zonal distribution characteristic. From the river main recharge area to north, east and west, finally to Juyan lake, Jinsutuhaizi and Gurinai lake depression, groundwater salinization changed from fresh to lightly saline, to moderately saline and to very saline. The confined groundwater belongs to the moderately saline in the study area. From the ionic ratio plot, it was showed that the dominant factors of determining the groundwater salinization in the study area were the silicate rock undergoing dissolving and evaporating-depositing. Dissolution mostly occurred in groundwater recharged area along the river course, evaporation and deposition in running-discharge area. The confined groundwater has low salinity less affected by evaporation due to being deeply buried in rock layer.
中文关键词	地下水 ; 盐化特征 ; 机理 ; 额济纳盆地
英文关键词	groundwater salinization characteristic mechanism Ejin basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:2441764
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220488
作者单位	1.上海交通大学环境科学与工程学院, 上海 200240, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	温小虎,仵彦卿,苏建平,等. 额济纳盆地地下水盐化特征及机理分析[J]. 中国科学院西北生态环境资源研究院,2006,26(5):836-841.
APA	温小虎,仵彦卿,苏建平,张应华,&刘发民.(2006).额济纳盆地地下水盐化特征及机理分析.,26(5),836-841.
MLA	温小虎,et al."额济纳盆地地下水盐化特征及机理分析".26.5(2006):836-841.