巢湖东部水源区及入湖河流无机氮形态特征及影响研究

目的]对我国巢湖东部水源区及入湖河流无机氮的形态特征及其影响进行研究。方法]研究巢湖东部水源区及入湖河流溶解性无机氮(DIN)的形态组成和分布特征,并探讨它们对水质的影响。结果]NH3-N、NO2--N平均浓度在汛期较高,非汛期较低,NO3--N正好相反;双桥河口NH3-N浓度远高于其他各点,污染最为严重。柘皋河口、小柘皋河口DIN主要为生活污水及工业废水污染所致;双桥河口地表径流、船舶污染等对DIN含量贡献较大。结论]该研究为巢湖富营养化控制和治理提供了基础数据和理论依据。

Characteristics and Effects of Inorganic Nitrogen in East Water-source and Inflow Rivers of Chaohu Lake

Objective] To study the characteristics and effects of inorganic nitrogen in east water-source and inflow rivers of Chaohu Lake.Method] The speciation and distribution characteristics of dissolvable inorganic nitrogen(DIN) in east water-source and inflow rivers of Chaohu Lake were investigated,and their effects on water quality were examined.Result] The mean concentrations of NH3-N and NO2——N are high in flood season,and low in non-flood season,while the concentration of NO3——N presents the opposite trend;the concentration of NO3-N is the highest in Shuangqiao estuary,where the pollution is the worst.DIN in Zhegao estuary and Xiaozhegao estuary is mainly caused by domestic sewage and industrial wastewaters;surface runoff and pollution from ships contribute the most to the DIN content in Shuangqiao estuary.Conclusion] This study provides basic data and theoretical basis for the control and management of eutrophication in Chaohu Lake.