| In order to investigate the pollution status and personal health risk of groundwater， the paper taking East Jiuquan Basin as an example, studies the distribution, migration, influencing factors and health risk assessment of three nitrogen by means of data statistics, spatial distribution trend, pollution sources and influencing factors analysis. The results show that： under the influence of the unique landscape, geomorphology, redox environment, the aeration zone and aquifer lithology, diving depth, acid and alkali environment and underground runoff of natural factors, as well as the destruction of the ecological environment and the development of urbanization, the overall content of “three nitrogen” in groundwater is low, and the pollution is relatively light, only a NONO3--N content exceed the standard limit; on the regionally distribution, In terms of regional distribution, the content of “three nitrogen” has an obvious pattern of high in the north and low in the south, The content of NONO3--N and NONO2--N is high in the east and west, and low in the middle, The content of NH4+-N gradually decreases from northwest to southeast. The overall distribution trend of personal annual health risk of “three nitrogen” was consistent, and the risk gradually decreased from the densely populated area in the west of the study area to the non-densely populated area in the east. |
