气候变化领域集成服务门户(CCPortal): Geostatistical analysis of temporal and spatial variations in groundwater levels and quality in the Minqin oasis, Northwest China

CCPortal

DOI	10.1007/s12665-013-2220-7
	Geostatistical analysis of temporal and spatial variations in groundwater levels and quality in the Minqin oasis, Northwest China
	Chen, Lijuan; Feng, Qi
发表日期	2013
ISSN	1866-6280
EISSN	1866-6299
卷号	70 期号:3
英文摘要	Recognition of the temporal and spatial variations in groundwater levels and quality has become a prerequisite of formulating strategies for the sustainable development and utilization of water resources. In this study, data were obtained from 51 observation wells of depth to groundwater from 1999 to 2008 and 30 sampling wells of hydrochemical characteristics of groundwater in the Minqin oasis. The Kolomogorov-Semirnov test revealed that all data followed normal or log-normal distribution. A set of well-structured semivariograms also confirmed that the data had moderate (only for Mg2+ and K+) or strong spatial dependence. Based on spatial distribution, maps drawn using the ordinary Kriging interpolation method in different periods, the declining trend of the groundwater table was found to have been relieved since 2007, with the mean water table dropping 4.65 m from 1999 to 2008. Spatial comparison results further showed that the variations in groundwater levels in Baqu and Quanshan were more evident than those in Huqu, with mean decline rates of 0.64, 0.93, and 0.41 m/year, respectively. The mean value of total dissolved solids (TDS) was 3.34 g/L, and the groundwater in 76.2 % of the study area was brackish (TDS a parts per thousand yen 1.0 g/L). From south to north, the groundwater types can be classified into three obvious zones based on the major ion distributions: SO4 (2-)-HCO3 (-)-Na+-Ca2+ type in Baqu, SO4 (2-)-Na+-Ca2+ type in Quanshan, and SO4 (2-)-C1(-)-Na+ type in Huqu. TDS increased from the 1970 to 2005 and gradually decreased thereafter.
关键词	Groundwater levels Groundwater quality Geostatistics Spatial variability
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111699
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Chen, Lijuan,Feng, Qi. Geostatistical analysis of temporal and spatial variations in groundwater levels and quality in the Minqin oasis, Northwest China[J]. 中国科学院西北生态环境资源研究院,2013,70(3).
APA	Chen, Lijuan,&Feng, Qi.(2013).Geostatistical analysis of temporal and spatial variations in groundwater levels and quality in the Minqin oasis, Northwest China.ENVIRONMENTAL EARTH SCIENCES,70(3).
MLA	Chen, Lijuan,et al."Geostatistical analysis of temporal and spatial variations in groundwater levels and quality in the Minqin oasis, Northwest China".ENVIRONMENTAL EARTH SCIENCES 70.3(2013).