滇中三大湖泊氮、磷水质变化趋势研究

通过对滇中抚仙湖、星云湖和杞麓湖1988～2005年总氮、总磷浓度的变化研究，发现抚仙湖全湖总氮平均浓度为0．179mg／L，总磷平均浓度为0．009mg／L；星云湖总氮为0．926mg／L，总磷0．075mg／L；杞麓湖总氮为2．446mg／L，总磷0．055mg／L。抚仙湖水质明显优于星云湖和杞麓湖，星云湖次之，杞麓湖水质呈逐年恶化趋势。

Study on Water Quality Change of Nitrogen and Phosphorus of Three Large Lakes in Yunnan

The study on water quality of monitoring data of Fuxian lake and Xingyun lake and Qilu lake from 1998 to 2005 in Yunnan shows that the average concentration of T - N of the whole Fuxian lake is 0. 179mg/l, and T - P is 0. 009mg/l, and the two indexes of Xingyun lake are 0. 926 mg/l and 0. 075 mg/l respectively, and2. 466mg/ l and 0. 055 mg/l in Qilu lake respectively. The water quality of Fuxian lake is obviously better than Xingyun lake and Qilu lake. Overall, the water quality of Fuxian lake is comparatively stable, and Xingyun lake is less than it, but T - P concentration goes up rapidly in recent years. The water quality of Qilu lake tends to worse year by year.