TheDistributionCharacteristicsofNitrogenin theYellowRiverEstuaryinSummer

郭興森 陳小艷

（1.青島大學(xué)環(huán)境科學(xué)與工程系，山東 青島266000；2.中國石油大學(xué)〈華東〉，山東 青島266000）

0 Introduction

Nitrogen is one of the main elements causing eutrophication. So this paper carried out a detailed research about the distribution characteristics of nitrogen, which can provide an important basis for dynamics of estuarine nutrient and estuarine eutrophication status.

1 Materials and Method

In this research 12 sampling points (Figure 1) were selected. Water temperature and salinity measured by the YSI-5000 on the spot. Water samples were brought back to the laboratory to be tested in accordance with the specifications set forth in the marine survey.

Figure 1 Location of sampling points

2 Results and discussion

3 Conclusion

In summer of 2013, the content of nitrogen, phosphorus nutritive salt is relatively rich, the concentration ofand NO2--N is 164.30ug/L and 6.14ug/L respectively. The highest concentration of NO3--N is 2.1mg/L. the concentration ofanddecreases with the increase in salinity, which is mainly affected by physical mixing process of dilution. NO3--N is low in freshwater side and high in sea side, mainly affected by phytoplankton.

［1］Wang K, Chen J F, Xu J, et al. The relationship between dissolved inorganic nitrogen and fresh-saline water mixing during summer in the Changjiang estuary and the adjacent East China Sea [J]. Acta Oceanologica Science, 2010,32(4):77-87.

［2］Pan S J, Shen Z L. Distribution and variation of dissolved inorganic nitrogen in Changjiang estuary and adjacent waters [J]. Marine Environment Science, 2010,29(4):205-237.