绍兴鉴湖富营养化现状调查及防制对策

目的　研究绍兴市鉴湖水系富营养化现状并提出防制对策。方法　通过对鉴湖水域污染物来源、种类、数量及污染程度的调查研究 ,运用多因素逐步回归分析建立水体富营养化生态数学模型。结果　鉴湖流域富营养化状态指数 (TLI)均大于 5 0 ,为富营养 ,5项状态变量中总磷 (TP)、总氮 (TN)、耗氧量 (COD)、叶绿素 (Chl a)、透明度(SD)与TLI有相关关系 ,以TP最强 (P <0 0 5 ,R =0 2 0 2 )。结论　绍兴鉴湖水体富养化较为严重 ,据此提出控制污染源头 ,加强综合治理 ,实施长效管理等防制措施。

Present eutrophic conditions of headwater of Jianhu lake and corresponding prevention measure

Objective To study the pressent eutrophic conditions of headwater of Jianhu lake in Shaoxing and provide the corresponding prevention measures.Methods To survey the pollution level,including sources,varieties and amounts and the pollution degree of Jianhu lake,then build a ecological mathematical model for the waterbody's eutrophication by multiple factors regression analysis.Results The eutrophic condition indexes(TLI) of Jianhu lake are all higher than 50,which is eutrophication.The correlative relations between the five condition variables(TP,TN,COD,Chl.a,SD) and TLI exist.TP is the the most.Conclusion The eutrophication of the headwater of Jianhu lake in Shaoxing is serious.Prevention measures such as controlling the pollution sources,strengthening synthetical governmnet,making long-effect controlling plans are suggested.