Spatial distribution and influencing factors of"Three-Nitrogen"in the shallow groundwater between two Drainage rivers
The Ganjiang River is the longest river in Jiangxi Province,which is not only the water intake for agricultural activities,but also the water intake for drinking water in many cities.Taking the shallow groundwater between two drainage rivers in the ganjiang river as research objects,field investigations and laboratory analyses were conducted to determine the fol-lowing results.The excess rates of NH4+-N,NO2--N,and NO3--N in 93 groundwater samples from the research area were 31.18％,0.00％,and 7.52％,and the coefficient of variation of"three-nitrogen"level was greater than or equal to 0.5 in 93 groundwater samples from research area,and the spatial distribution of"three-nitrogen"was great difference.The main factors affecting the"three-nitrogen"level included contaminant types,contaminant distribution、aquatic chemistry,and the thickness of vadose zone.
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