气候变化领域集成服务门户(CCPortal): Nitrate in groundwater of China: Sources and driving forces

CCPortal

DOI	10.1016/j.gloenvcha.2013.05.004
	Nitrate in groundwater of China: Sources and driving forces
	Gu B.; Ge Y.; Chang S.X.; Luo W.; Chang J.
发表日期	2013
ISSN	0959-3780
卷号	23 期号:5
英文摘要	Identifying the sources of reactive nitrogen (N) and quantifying their contributions to groundwater nitrate concentrations are critical to understanding the dynamics of groundwater nitrate contamination. Here we assessed groundwater nitrate contamination in China using literature analysis and N balance calculation in coupled human and natural systems. The source appointment via N balance was well validated by field data via literature analysis. Nitrate was detected in 96% of groundwater samples based on a common detection threshold of 0.2mgNL-1, and 28% of groundwater samples exceeded WHO's maximum contaminant level (10mgNL-1). Groundwater nitrate concentrations were the highest beneath industrial land (median: 34.6mgNL-1), followed by urban land (10.2mgNL-1), cropland (4.8mgNL-1), and rural human settlement (4.0mgNL-1), with the lowest found beneath natural land (0.8mgNL-1). During the period 1980-2008, total reactive N leakage to groundwater increased about 1.5 times, from 2.0 to 5.0TgNyear-1, in China. Despite that the contribution of cropland to the total amount of reactive N leakage to groundwater was reduced from 50 to 40% during the past three decades, cropland still was the single largest source, while the contribution from landfill rapidly increased from 10 to 34%. High reactive N leakage mainly occurred in relatively developed agricultural or urbanized regions with a large population. The amount of reactive N leakage to groundwater was mainly driven by anthropogenic factors (population, gross domestic product, urbanization rate and land use type). We constructed a high resolution map of reactive N source appointment and this could be the basis for future modeling of groundwater nitrate dynamics and for policy development on mitigation of groundwater contamination. © 2013 Elsevier Ltd.
英文关键词	Driving force; High resolution; Landfill; Nitrate; Pollution; Source
学科领域	Gross Domestic Product; groundwater; groundwater pollution; human settlement; land use; landfill; leakage; nitrate; policy development; pollutant; urbanization; China
语种	英语
scopus关键词	Gross Domestic Product; groundwater; groundwater pollution; human settlement; land use; landfill; leakage; nitrate; policy development; pollutant; urbanization; China
来源期刊	Global Environmental Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/117930
作者单位	College of Economics, Zhejiang University, Hangzhou 310027, China; College of Life Sciences, Zhejiang University, Hangzhou 310058, China; Research Center for Sustainable Development, Zhejiang University, Hangzhou 310058, China; Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3, Canada
推荐引用方式 GB/T 7714	Gu B.,Ge Y.,Chang S.X.,et al. Nitrate in groundwater of China: Sources and driving forces[J],2013,23(5).
APA	Gu B.,Ge Y.,Chang S.X.,Luo W.,&Chang J..(2013).Nitrate in groundwater of China: Sources and driving forces.Global Environmental Change,23(5).
MLA	Gu B.,et al."Nitrate in groundwater of China: Sources and driving forces".Global Environmental Change 23.5(2013).