GYIG OpenIR  > 环境地球化学国家重点实验室
Evaluation of Factors Driving Seasonal Nitrate Variations in Surface and Underground Systems of a Karst Catchment
Fu-Jun Yue;  Si-Liang Li;  Jun Zhong;  Jing Liu
2018
发表期刊Vadose Zone Journal
卷号17期号:1页码:1-10
摘要

A typical mixed-land-use karst catchment in Guizhou Province, southwestern China, with well-developed conduit networks was studied to understand the spatiotemporal variability of nitrate sources and transformation processes. High nitrate concentrations were detected in the karstic study area, which is particularly vulnerable to anthropogenic pollution and is considered a representative catchment to understand the surface-underground system in southwestern China. The stable isotopes of water and nitrate (delta D-water, delta O-18(water), N-delta 15(nitrate), and delta O-18(nitrate)) were used to identify nitrate sources and to assess seasonal variations in hydrological processes affecting nitrate levels. Monthly sampling indicated that nitrate flux is strongly related to agricultural activities and the intensity of rainfall, which can accelerate transport between the surface water (SFW) and underground water (UGW) systems. Nitrate in water samples showed nitrification characteristics and was mainly derived from the oxidation of reductive fertilizers including organic N fertilizer. The isotopic composition of nitrate was affected by denitrification, particularly in the wet season. Isotopic signatures indicate that moderate evaporation occurs during the dry season. Denitrification in underground conduits appears to be relatively minor compared with that in SFW. The results of this study suggest that rainfall is an important factor influencing N flux, which has implications for water management.

收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8830
专题环境地球化学国家重点实验室
作者单位1.State Key Lab. of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
3.Tianjin Univ, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China
4.School of Geographical and Earth Sciences, Univ. of Glasgow, Glasgow G12 8QQ, UK
推荐引用方式
GB/T 7714
Fu-Jun Yue;Si-Liang Li;Jun Zhong;Jing Liu. Evaluation of Factors Driving Seasonal Nitrate Variations in Surface and Underground Systems of a Karst Catchment[J]. Vadose Zone Journal,2018,17(1):1-10.
APA Fu-Jun Yue;Si-Liang Li;Jun Zhong;Jing Liu.(2018).Evaluation of Factors Driving Seasonal Nitrate Variations in Surface and Underground Systems of a Karst Catchment.Vadose Zone Journal,17(1),1-10.
MLA Fu-Jun Yue;Si-Liang Li;Jun Zhong;Jing Liu."Evaluation of Factors Driving Seasonal Nitrate Variations in Surface and Underground Systems of a Karst Catchment".Vadose Zone Journal 17.1(2018):1-10.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Evaluation of Factor(1802KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Fu-Jun Yue;Si-Liang Li;Jun Zhong;Jing Liu]的文章
百度学术
百度学术中相似的文章
[Fu-Jun Yue;Si-Liang Li;Jun Zhong;Jing Liu]的文章
必应学术
必应学术中相似的文章
[Fu-Jun Yue;Si-Liang Li;Jun Zhong;Jing Liu]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Evaluation of Factors Driving Seasonal Nitrate Variations in Surface and Underground Systems of a Karst Catchment.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。