滇池富营养化发展趋势分析及其控制对策

1988～1999年滇池监测数据的统计分析表明,滇池水质在继续恶化,全湖水质超V类,富营养化程度呈上升趋势.近10年来,滇池主体外海TP浓度增加了一倍多,叶绿素a增长了十几倍,营养水平由富营养发展到严重富营养,增加了两个级别,发展趋势近年来尤为明显.P是近10年来滇池水体中增长最快的营养盐,水体中P浓度的持续增

Analysis on Eutrophication of Dianchi Lake and its Control Mea sures

The monitoring data of the Dianchi Lake during 1988-1999 shows that the water quality has been deteriorating and exceeded Grade V and the trophic level has been constantly rising.In the part of the Waihai,the TP concentration doubled,Chla concentration rose by ten times,and the trophic level went up from eutrophication to hyper-eutrophication over the past ten years.The increase of P concentration is the principle reason for the aggravation of the eutrophication.Nutriments of the Dianchi Lake mainly come from domestic wastewater and the agricultural source.The nonpoint pollution is the primary causte of the deterioration of water quality in the Waihai.The treatment of the Dianchi Lake focused on point pollution and the control of pollution source within the Caohai and no non-point control and lake ecological treatment have been conducted.In this case,this article makes a special emphasis on the strengthened treatment of non-point pollution,lake ecological rehabilitation and management.