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.