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- W2390676127 abstract "Water flow capacity and its quality were monitored synchronously at chief tributaries of Xiangxi River in Three Gorges Reservoir during typical raining.Surface flow and baseflow of rains were divided by use of baseflow index resulted from digital filter method.Mean nitrogen concentrations of direct surface flow and baseflow were estimated with weighted average method,and variation of nitrogen output from point source and non-point source during rains was analyzed.It indicated that the flow rate showed the same variation tendency of nitrogen concentration,the concentration rose at the beginning raining root in initial ground surface flushing and peak occurred at the same time as the flow peaks,then decreased with flow and finally kept in steady state.Various species of nitrogen concentrations all showed direct surface flow higher than baseflow.Non-point source pollution is the dominant output load,with load ratio all over 70%,and the contribution rate of load ranked from high to low as TN,DTN,NO3--N,NH4+-N,TN output mainly by DTN,DTN mainly by NO3--N.Runoff volume has prominent correlation with nitrogen output load,TN,DTN,NO3--N,NH4+-N correlation of load and flow are 0.93,095,0.98,0.88.The effective control of agricultural non-point source is the key to combat eutrophication in Xiangxi Basin." @default.
- W2390676127 created "2016-06-24" @default.
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- W2390676127 date "2013-01-01" @default.
- W2390676127 modified "2023-09-22" @default.
- W2390676127 title "Characteristics of Non-point Source Nitrogen Pollution Load in Xiangxi Basin during Raining" @default.
- W2390676127 hasPublicationYear "2013" @default.
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