Analysis of the Distribution Characteristics of Shallow Groundwater Nitrogen Concentration in the Urban Planning Area of Guangzhou City
In order to verify the nitrogen pollution status of shallow groundwater in Guangzhou,the urban plan-ning area of Guangzhou was selected as the research area,and 14 sample points representing different land use types were selected for water quality analysis.The present situation of nitrogen pollution in shallow groundwater,the characteristics of temporal and spatial changes and the composition characteristics of various forms of nitrogen were analyzed.The results show that the nitrogen pollution of shallow groundwater in the study area is serious.The average contents of total nitrogen,dissolved inorganic nitrogen,total organic nitrogen,ammonia nitrogen,ni-trite nitrogen and nitrate nitrogen were 8.23,5.45,2.77,2.53,0.12 and 2.81 mg/L,respectively.The coefficient of variation of each nitrogen form was large,and the spatial differentiation was significant.The nitrogen pollution in the old city is much more serious than that in other areas,especially the ammonia nitrogen pollution.Inorganic ni-trogen is the main form of nitrogen in groundwater,and ammonia nitrogen is the main form of inorganic nitrogen.
万方数据
维普
