综合营养状态指数法在巢湖水体富营养化评价中的应用

Application of Comprehensive Eutrophication State Index Method in Evaluation of Chaohu Lake Reservoir Eutrophication

为研究巢湖水体富营养化现状,该研究选择叶绿素a(Chl-a)、TP、TN、CODMn、透明度(SD)5个监测指标作为研究对象,运用综合营养状态指数法对巢湖水体富营养化程度进行评价。结果表明:巢湖各监测点的综合营养状态指数在50~70,属于轻中度富营养级别,轻中度污染水质;巢湖西半湖比东半湖的富营养化程度更高;影响巢湖水质的主要因子是SD、TN和TP;巢湖水体富营养化随季节变化明显,总体上富营养化程度在夏季最高,秋冬季次之。

In order to study the status of eutrophication in Chaohu Lake,five monitoring indicators of Chla,TP,TN,CODMn and transparency（SD）were selected as research objects.Comprehensive eutrophication status index methodwas used to evaluate the level of eutrophication in Chaohu Lake.Results showed that the comprehensive eutrophica-tion status index of Chaohu Lake was between 50 and 70,which was light and moderate eutrophication level,lightand moderate polluted water quality.The western hemial lake of Chaohu Lake was more eutrophic than the easternhemial lake.The water quality of Chaohu Lake was affected by the main factors which are SD,TN,and TP.The eutro-phication of Chaohu Lake varies significantly with seasons,and the level of eutrophication is highest in summer,followed by autumn and winter.