【摘要】 针对淀山湖严重富营养化的问题,应用三维水动力-水质耦合模型ELCOM-CAEDYM对淀山湖水质进行了模拟,确定了一套可应用于淀山湖水质模拟的参数,并对模拟结果进行了验证;验证结果显示,ELCOM-CAEDYM耦合模型较好地模拟了常规水质和藻类浓度动态变化,模拟结果的总体变化趋势与实测结果相符合.同时运用该模型对淀山湖营养物的投入响应关系进行了模拟研究.从模拟结果来看,淀山湖叶绿素a含量随淀山湖磷输入量的变化而变化的趋势较显著,氮输入量的增加对淀山湖叶绿素a含量的影响并不明显,当淀山湖总氮含量降低到3.70-4.31mg/L之间的某个临界值以下或者更低时,淀山湖叶绿素a的含量会明显减少.更多还原

【Abstract】 The Lake Dianshan is suffered from eutrophication problem.Based on the ELCOM-CAEDYM model,this paper simulated the water quality of Lake Dianshan in 2008,settled a set of parameters applicable for the simulation,and validated the simulation result.The water-temperature simulation result was satisfactory,which indicated that the all-year simulated fluctuation of TN,TP and algal concentration agreed with the measured data.Furthermore,this paper applied the model in simulating the effect of nutrients input(nitrogen and phosphorus) on algal growth in Lake Dianshan.The simulation result revealed that the concentration of Chl.a changed significantly with input amount of phosphorus in Lake Dianshan.The increasing of input amount of nitrogen has not affected the concentration of Chl.a.But if the concentration of TN were lower than the critical value of 3.70-4.31mg/L,the concentration of Chl.a would decrease obviously in Lake Dianshan.更多还原