|Fan Chengxin,Qing Boqiang,Sun Yue.Substance Exchange Across in Meiliang Bay Water-Sediment Interface and WllIi Lake. J. Lake Sci.1998,10(1):73-78. DOI:10.18307/1998.0112
|研究了25℃条件下太湖北部湖区水－沉积物界面的物质交换结果表明:五里湖沉积物中的氮、磷和CODMn的释放程度明显高于梅梁湖, 其NH4+－N、DTP和DCOD的平均溶出速率分别为158.2、2.05和27.8mg/（m2·d）;梅梁湖北部湖区形态氮处于“负释放”状态, DTP和DCOD溶出速率分别为0.584mg/（m2·d）和8.9mg/（m2·d）.此外, 形态氮、磷和DCOD的水－沉积物界面物质交换量与底泥中总氮、总磷和有机质含量有显著对应关系根据内源负荷分析.认为减少局部湖区沉积物氛、磷和COD的释放, 将是控制太湖水质恶化和富营养化的重要途径
|关键词: 水-沉积物界面 物质交换 梅梁湖 五里湖
|Substance Exchange Across in Meiliang Bay Water-Sediment Interface and WllIi Lake
Fan Chengxin, Qing Boqiang, Sun Yue
Nanjing Institute of Geography and Limnology, Chinese Acndemy of Sciences, Nanjing 210008
|The aubstance exchange across the water-sediment interface in the north Taihu Lake was studied under the condition of 25℃.The results show that the release levels of nitrogen.phos-phorus and COD in Wuli Lake area are distinctly higher than those in Meiliang Bay, and the aver.age release rates of their NH4+-N, DTP and DCOD are 158.2.2.05, and 27.8mg/(m2·d).Re-spectively.In the northern part of Meiliang Bay, formal nitrogen negatively releases and howev-er, DTP and DCOD release rates are separatively 0.584 and 8.9mg/(m2·d) Morever, the ex-changable amount of the form al nitrogen, phosphorus and DCOD on the water-sedim ent interface has obviously to do with content of the total nitrogen, total phosphorus and organic matter in the corresponding sediments.On the basis of internal pollution source analysis, restraining the release of nitrogen, phos phorus and COD in the part lake area is considered to be one of the important measures to control the water pollution and eutrophication of Taihu Lake.
|Key words: Water-sediment interface substance exchange Meiliang Bay Wuli Lake