干旱区生态环境知识资源中心(Arid): Groundwater quality assessment using a new integrated-weight water quality index (IWQI) and driver analysis in the Jiaokou Irrigation District, China

Arid

DOI	10.1016/j.ecoenv.2021.111992
	Groundwater quality assessment using a new integrated-weight water quality index (IWQI) and driver analysis in the Jiaokou Irrigation District, China
	Zhang, Qiying; Qian, Hui; Xu, Panpan; Hou, Kai; Yang, Faxuan
通讯作者	Qian, H (corresponding author), Changan Univ, Sch Water & Environm, Xian 710054, Shaanxi, Peoples R China.
来源期刊	ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
ISSN	0147-6513
EISSN	1090-2414
出版年	2021
卷号	212
英文摘要	Groundwater is an important water resource in arid and semi-arid regions. The impact of human activities on groundwater is increasing. After 60 years running, the groundwater quality and its formation mechanism are imperative questions needed to be answered in Jiaokou Irrigation District, Guanzhong Basin, China. In this study, the quality of groundwater in Jiaokou Irrigation District was assessed by a new integrated-weight water quality index (IWQI), and the groundwater chemistry is studied through integrated statistical, geostatistical and hydrogeochemical approaches. The patterns for the average anion and cation concentrations were HCO3- > SO42- > Cl- > NO3- > CO32- > NO2-, and Na+ > Mg2+ (>) Ca2+ > K+ > NH4+, respectively. Statistics showed that the major water chemistry types were HCO3-Na, SO4 center dot Cl-Na, and Cl center dot SO4-Na. A new integrated-weight water quality index (IWQI) was proposed based on the entropy-weighted method and CRITIC method and showed excellent performance for explaining and evaluating the groundwater quality. The IWQI results show 65.33% of groundwater, mainly distributed in the central and western parts of this study area, was unsuitable for drinking. Furthermore, SO42-, HCO3-, Cl-, NO3-, and Na+ had more important effects on groundwater quality. The weathering process affecting groundwater quality in the study area is carbonate dissolution, followed by silicate weathering and evaporite dissolution, whereas the major geochemical processes include the dissolution and precipitation of calcite, as well as the dissolution of dolomite and gypsum (anhydrite). Cation exchange also plays an important role in the hydrogeochemical evolution of groundwater with a long residence time. Anthropogenic activities affecting groundwater quality included long-term irrigation infiltration and excessive use of fertilizers. The findings and the results of the study can improve understanding of the processes driving groundwater chemistry in Jiaokou Irrigation District, and can be used for reference to other similar regions in the world.
英文关键词	Hydrogeochemistry Integrated-weight water quality index (IWQI) Groundwater evolution Anthropogenic activities Irrigation district Guanzhong Basin
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000620092800006
WOS类目	Environmental Sciences ; Toxicology
WOS研究方向	Environmental Sciences & Ecology ; Toxicology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350055
作者单位	[Zhang, Qiying; Qian, Hui; Xu, Panpan; Hou, Kai; Yang, Faxuan] Changan Univ, Sch Water & Environm, Xian 710054, Shaanxi, Peoples R China; [Zhang, Qiying; Qian, Hui; Xu, Panpan; Hou, Kai; Yang, Faxuan] Changan Univ, Key Lab Subsurface Hydrol & Ecol Effects Arid Reg, Minist Educ, Xian 710054, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qiying,Qian, Hui,Xu, Panpan,et al. Groundwater quality assessment using a new integrated-weight water quality index (IWQI) and driver analysis in the Jiaokou Irrigation District, China[J],2021,212.
APA	Zhang, Qiying,Qian, Hui,Xu, Panpan,Hou, Kai,&Yang, Faxuan.(2021).Groundwater quality assessment using a new integrated-weight water quality index (IWQI) and driver analysis in the Jiaokou Irrigation District, China.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,212.
MLA	Zhang, Qiying,et al."Groundwater quality assessment using a new integrated-weight water quality index (IWQI) and driver analysis in the Jiaokou Irrigation District, China".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 212(2021).