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  4. 中国科学院新生代地质与环境重点实验室
Spatiotemporal variations of nitrate sources and dynamics in a typical agricultural riverine system under monsoon climate

文献类型：期刊论文

作者Jiang, Hao1,2,3,6; Liu, Wenjing1,5,6; Zhang, Jiangyi1,5,6; Zhou, Li4; Zhou, Xiaode5,6; Pan, Ke3; Zhao, Tong6; Wang, Yuchen5,6; Xu, Zhifang1,5,6
刊名JOURNAL OF ENVIRONMENTAL SCIENCES
出版日期2020-07-01
卷号93页码:98-108
关键词Nitrate Source Dynamics Isotope MCMC mixing model
ISSN号1001-0742
DOI10.1016/j.jes.2020.03.007
英文摘要Nitrogen pollution is a serious environmental issue in the Danjiangkou Reservoir region (DRR), the water source of the South-to-North Water Diversion Project of China. In this research, seasonal surveys and a bi-weekly time series survey were conducted in the Qihe River Basin, one of the most densely populated agricultural basins in the DRR. Hydrochemical compositions (NO3- and Cl-), dual isotopes (delta D-H2O, delta O-18-H2O, delta N-15-NO3, and delta O-18-NO3-), and a Markov Chain Monte Carlo isotope mixing model were jointly applied to unravel the sources, migrations, and transformations of the nitrate (NO3-) in the basin. It was revealed that the mixing between different sources was the main process controlling the isotopic compositions of the riverine NO3- in the upper-middle reaches. In contrast, denitrification occurred in the lower reaches. For the first time, the sources of NO3- were quantified at a basin scale in the DRR. Overall, the river transported 484.2 tons/year of NO3-N to the reservoir, of which 32.6%, 36.4%, 28.0%, and 3.0% was from soil organic nitrogen, chemical fertilizer, residential sewage and atmospheric precipitation, respectively. The NO3- N fluxes of the different sources were regulated by the monsoon climate and anthropogenic activities. For example, high precipitation and intense fertilization resulted in severe nonpoint source pollution. Denitrification thrived in soils and reservoirs in wet seasons. Temperature could regulate the migration, nitrification and denitrification processes. Based on the results, we suggest that the management strategies dealing with nitrogen pollution issue in the DRR should follow the specific spatiotemporal characteristics of NO3- sources, migration and transformation mechanisms. (C) 2020 Published by Elsevier B.V. on behalf of The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.
WOS关键词NONPOINT-SOURCE POLLUTION ; DUAL-ISOTOPE APPROACH ; DANJIANGKOU RESERVOIR ; WATER-QUALITY ; LAND-USE ; SOURCE IDENTIFICATION ; SOURCE APPORTIONMENT ; UNCERTAINTY ANALYSIS ; NITROGEN ; DENITRIFICATION
资助项目Natural Science Foundation of China[41673020] ; Natural Science Foundation of China[41730857] ; Key Research Program of the Chinese Academic of Sciences[ZDRW-ZS-2016-7-2]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000535960800010
出版者SCIENCE PRESS
资助机构Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences ; Key Research Program of the Chinese Academic of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/96680]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Xu, Zhifang
作者单位1.CAS Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
2.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
3.Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China
4.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Jiang, Hao,Liu, Wenjing,Zhang, Jiangyi,et al. Spatiotemporal variations of nitrate sources and dynamics in a typical agricultural riverine system under monsoon climate[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2020,93:98-108.
APA Jiang, Hao.,Liu, Wenjing.,Zhang, Jiangyi.,Zhou, Li.,Zhou, Xiaode.,...&Xu, Zhifang.(2020).Spatiotemporal variations of nitrate sources and dynamics in a typical agricultural riverine system under monsoon climate.JOURNAL OF ENVIRONMENTAL SCIENCES,93,98-108.
MLA Jiang, Hao,et al."Spatiotemporal variations of nitrate sources and dynamics in a typical agricultural riverine system under monsoon climate".JOURNAL OF ENVIRONMENTAL SCIENCES 93(2020):98-108.

入库方式： OAI收割

来源：地质与地球物理研究所

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