典型文献
Influence of nitrogen wet deposition on nitrogen output in a typical watershed in the Three Gorges Reservoir Area
文献摘要:
In order to explore the influence of wet nitrogen(N)deposition on N output in watersheds,this study selected a typical small watershed(Chenjiagou,CJG)in the Three Gorges Reservoir(TGR)area based on one-year observation of rainfall-runoff N forms.Characteristics and sources of N output were clarified by chemical statistics and isotopic abundance,and the contribution of N deposition to the N output was quantified by the output coefficient method.The N flux of wet deposition was estimated at 18.53 kg N ha-1 yr-1,and originated mostly from agricultural activities.Watershed N was significantly accumulated from upper to lower reaches due to frequent human activities.Seasonal changes of riverine N were strongly affected by chemical fertilizer,with the highest concentration in spring and the lowest in winter.Nitrate was mainly derived from chemical fertilizer,accounting for 38.83%of all sources.N concentration in processes of different rainfall events had a hysteresis effect corresponding to the flow rate.Three rainfall events greatly changed DTN(Dissolved total N)outputs:rainstorm caused 91.26 kg DTN output,which was 11 times that of moderate rain(8.46 kg)and 4 times that of heavy rain(20.80 kg).N deposition contributed 19.89%of riverine N output in the watershed.The results can provide theoretical support for the control of N pollution in the TGR area.
文献关键词:
中图分类号:
作者姓名:
LU Chen-dong;ZHANG Liu-yi;YAN Kun;WANG Yu-kuan;XIONG Shan-gao;HUANG Chen-tao;LI Ting-zhen;NI Mao-fei
作者机构:
Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir Area,Chongqing Three Gorges University,Wanzhou 404000,China;Institute of Strategic Planning,Chinese Academy of Environmental Planning,Beijing 100043,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China;College ofEco-Environmental Engineering,Guizhou Minzu University,Guiyang 550025,China
文献出处:
引用格式:
[1]LU Chen-dong;ZHANG Liu-yi;YAN Kun;WANG Yu-kuan;XIONG Shan-gao;HUANG Chen-tao;LI Ting-zhen;NI Mao-fei-.Influence of nitrogen wet deposition on nitrogen output in a typical watershed in the Three Gorges Reservoir Area)[J].山地科学学报(英文版),2022(08):2214-2225
A类:
Chenjiagou,CJG
B类:
Influence,nitrogen,wet,deposition,typical,Three,Gorges,Reservoir,Area,order,explore,influence,watersheds,this,study,selected,small,TGR,area,one,year,observation,rainfall,runoff,forms,Characteristics,sources,were,clarified,by,chemical,statistics,isotopic,abundance,contribution,was,quantified,coefficient,method,flux,estimated,yr,originated,mostly,from,agricultural,activities,Watershed,significantly,accumulated,upper,lower,reaches,due,frequent,human,Seasonal,changes,riverine,strongly,affected,fertilizer,highest,concentration,spring,lowest,winter,Nitrate,mainly,derived,accounting,processes,different,events,had,hysteresis,effect,corresponding,flow,greatly,changed,DTN,Dissolved,total,outputs,rainstorm,caused,which,times,that,moderate,heavy,contributed,results,provide,theoretical,support,control,pollution
AB值:
0.544216
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