干旱区生态环境知识资源中心(Arid): Effects of recharge process on groundwater nitrate concentration in an oasis of Tengger Desert hinterland, China

Arid

DOI	10.1007/s11356-023-29284-0
	Effects of recharge process on groundwater nitrate concentration in an oasis of Tengger Desert hinterland, China
	Qi, Shi; Shu, Heping; Li, Jisheng; He, Jianhua
通讯作者	Qi, S
来源期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN	0944-1344
EISSN	1614-7499
出版年	2023
卷号	30 期号:43 页码:97531-97544
英文摘要	Groundwater nitrate concentrations cannot be effectively diluted in an oasis of desert hinterland without direct recharge from external rivers. Therefore, there is an urgent need to understand the relationship between groundwater nitrate concentration and the groundwater recharge process. Using hydrochemicals, stable isotopes, LUCC, and combining these with the MixSIAR model, the distributions of groundwater nitrate concentration in the Dengmaying Basin (DMYB) in 2006 and 2020 were obtained. The contributions of groundwater recharge and nitrate sources were also quantified. With the development of agriculture in the DMYB, groundwater irrigation leakage has gradually become a crucial recharge source of groundwater, with a recharge proportion reaching 30.3%. From 2006 to 2020, under the influence of well irrigation and agricultural fertilization, the groundwater nitrate concentration in the DMYB increased significantly, with an increased range of 1.3 similar to 14.3 mg L-1. Moreover, the delta N-15-NO3- and delta O-18-NO3- values of nitrate in cultivated soil water were similar to those in groundwater, which also proves the process of carrying nitrate from the vadose zone into groundwater by irrigation water. The contribution of anthropogenic sources (54.9%) to groundwater nitrate exceeded that of natural sources (45.1%) to groundwater nitrate in the DMYB. These results indicate that the potential for nitrate pollution in groundwater must be considered, even in desert oases.
英文关键词	Desert hinterland Groundwater NO3- concentration Stable isotope Agricultural activity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001051236000014
WOS关键词	LAND-USE ; SOURCE APPORTIONMENT ; UNSATURATED ZONE ; CONTAMINATION ; ISOTOPES ; NITROGEN ; BASIN ; DENITRIFICATION ; WATER ; QUANTIFICATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396284
推荐引用方式 GB/T 7714	Qi, Shi,Shu, Heping,Li, Jisheng,et al. Effects of recharge process on groundwater nitrate concentration in an oasis of Tengger Desert hinterland, China[J],2023,30(43):97531-97544.
APA	Qi, Shi,Shu, Heping,Li, Jisheng,&He, Jianhua.(2023).Effects of recharge process on groundwater nitrate concentration in an oasis of Tengger Desert hinterland, China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,30(43),97531-97544.
MLA	Qi, Shi,et al."Effects of recharge process on groundwater nitrate concentration in an oasis of Tengger Desert hinterland, China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 30.43(2023):97531-97544.