Assessing the land use type and environment factors affecting groundwater nitrogen in an arid oasis in northwestern China

doi:10.1007/s11356-020-09745-6

	Assessing the land use type and environment factors affecting groundwater nitrogen in an arid oasis in northwestern China
	Wang, Lisha 1,2; He, Zhibin 1; Li, Jing 1,2
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2020-07-12
页码	14
关键词	Environmental factors Nitrogen pollution Redundancy analysis Temporal-spatial variations Zhangye Oasis
ISSN号	0944-1344
DOI	10.1007/s11356-020-09745-6
通讯作者	He, Zhibin(hzbmail@lzb.ac.cn)
英文摘要	Identifying the magnitude and seasonal variability of groundwater nitrogen (N) under various land use types and quantifying the contribution of their environmental factors are of great importance when attempting to implement prioritizing effective strategies for mitigating groundwater N pollution. In this study, hydrochemical investigation was used to assess the magnitude and temporal variability of groundwater N in arid regions. Spatial distributions of N species (total N (TN), nitrate-N (NO3--N), ammonium-N (NH4+-N), and nitrous-N (NO2--N)) were mapped using geostatistical techniques. Redundancy analysis (RDA) was conducted to determine environmental factors controlling hydrochemistry. The results showed that residential areas (town and village) and cropland had higher groundwater N concentrations than natural (forest and grassland) and unused land. And the concentrations of N species in rain season (August) were greater than those in the dry season (March) and normal season (November). The N species spatial patterns showed that there is a risk of TN and NO3--N pollution in groundwater of town and surrounding developed cropland, and that NH4+-N and NO2--N pollution were negligible. Selected environmental factors explained a total of 77.4% of data variance in N concentrations. These factors indicated that water environmental factors (dissolved oxygen (DO), oxidation-reduction potential (ORP), water temperature (WT), and pH) affect groundwater concentrations and forms of N by influencing the process of nitrification and denitrification, which explained about 60% of the variance of the data. Approximately 10.8 and 8.3% of the variability was explained by shallow groundwater depth and soil texture, indicating that N concentrations in groundwater had heterogeneous influence. The high N excessive pollution ratio was observed in towns and cropland indicating that artificial N input is the main reason for groundwater N pollution in the study area. Hence, ameliorating anthropogenic agricultural practices and reducing N input in urban areas are critical to alleviating groundwater N pollution in the research area.
WOS关键词	NITRATE CONTAMINATION ; SHALLOW GROUNDWATER ; RIPARIAN ZONES ; MARGINAL OASIS ; HEXI CORRIDOR ; WATER ; SOIL ; POLLUTION ; QUALITY ; AGRICULTURE
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000547800100008
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/158398]
专题	中国科学院地理科学与资源研究所
通讯作者	He, Zhibin
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Chinese Ecosyst Res Network,Linze Inland River Ba, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lisha,He, Zhibin,Li, Jing. Assessing the land use type and environment factors affecting groundwater nitrogen in an arid oasis in northwestern China[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2020:14.
APA	Wang, Lisha,He, Zhibin,&Li, Jing.(2020).Assessing the land use type and environment factors affecting groundwater nitrogen in an arid oasis in northwestern China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,14.
MLA	Wang, Lisha,et al."Assessing the land use type and environment factors affecting groundwater nitrogen in an arid oasis in northwestern China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2020):14.