干旱区生态环境知识资源中心(Arid): 陇东盆地白垩系地下水运移研究

Arid

	陇东盆地白垩系地下水运移研究
其他题名	Evaluation of the Movement of Cretaceous Groundwater Beneath the Longdong Basin
	刘心彪; 张彦林; 王延江; 周斌
ISSN	1001-4675
出版年	2009
卷号	26 期号:2 页码:176-180
中文摘要	陇东盆地气候干旱、降雨稀少,盆地内分布着复杂的地下水含水层,如何有效的评价地下水资源量,怎样合理的开发利用地下水资源成为亟待解决的问题.因此,以白垩系环河组地下水为例,在研究区沿泾河和马莲河共采集水化学样25组,同位素样30组,通过对比分析地下水与地表水水化学样和同位素样的测试结果,来探讨陇东盆地白垩系地下水的控制因素和运移规律.陇东盆地白垩系地下水水化学、同位素特征表明:地下水源于大气降水,向斜两翼为现代降水,向斜核部多为古地质历史时期大气降水;地下水从东西两翼顺层汇集到天环向斜核部,在盆地中部地区河流下游地段排泄于河流或流出盆地;盆地西翼地下水径流交替较东翼快.受陇东盆地地层结构的影响,白垩系地下水向斜核部运移缓慢.
英文摘要	The Longdong Basin is an inland basin in the southwest portion of the Ordos Basin that has an arid climate and limited annual precipitation.The area of the Longdong Basin is 3.5*10~4 km~2,and the aquifer under the Basin is complicated.It is very important to estimate and rationally utilize the limited groundwater resources in the Longdong Basin to maintain ecological balance in the area.Here,a case study evaluating the formation causes and movement of cretaceous groundwater under the Longdong Basin is presented.This study included a comparison and analysis of the hydrochemical and isotopic contents of 25 hydrochemistry samples and 30 isotope samples of surface water and groundwater that were collected along the Jinhe River and Malian River in the study area.The results of the hydrochemistry and isotope analysis revealed that groundwater under the Longdong Basin is derived from atmospheric precipitation,it under the syncline wings roots in modern precipitation,but it under the syncline axial area roots in age-old precipitation during the geologic processes.Groundwater flow under the basin,which is controlled by the syncline,converges from the two wings to the axial area of the syncline and then flows into the lower reaches of the rivers or out of the basin.Replacement of groundwater under the western wing occurs more frequently than under the eastern one.Cretaceous groundwater under the syncline axial area flows slowly because of the effect of the stratum structure in the Longdong Basin.
中文关键词	地下水 ; 水化学 ; 同位素 ; 白垩系 ; 向斜盆地 ; 陇东盆地
英文关键词	groundwater hydrochemistry isotope cretaceous synclinal basin Longdong 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:3657514
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223594
作者单位	甘肃省地质环境监测院, 兰州, 甘肃 730050, 中国
推荐引用方式 GB/T 7714	刘心彪,张彦林,王延江,等. 陇东盆地白垩系地下水运移研究[J],2009,26(2):176-180.
APA	刘心彪,张彦林,王延江,&周斌.(2009).陇东盆地白垩系地下水运移研究.,26(2),176-180.
MLA	刘心彪,et al."陇东盆地白垩系地下水运移研究".26.2(2009):176-180.