福州第二水源山仔水库营养类型的判定及变化趋势分析

对1998～2002年山仔水库监测数据．运用属性识别方法进行评价分析，其结果表明，这5年来湖泊富营养化程度有明显减弱的趋势，但1998年水体达极富营养状态．在2001年后水质有明显好转。通过判定该水库5年的营养状态，分析其变化趋势．可找出引起富营养化的原因。

Decision and Variation Tendency of Trophic Type of Shanzi Reservoirr, Fuzhou

According to the monitoring data from 1998 to 2002 of Shanzi Reservoir, the attribute recognition is applied to the evaluation of trophic types.The result suggests there was a decrease in lake eutrophication from 1998 to 2002, the water was hypereutrophic in 1998 and the water quality of Shanzi reservoir has become good since 2001.By deciding trophic types and analyzing variation tendency,we can find the causes resulting in the lake eutrophication and provide scientific data for the government to take effective measurements of managing and protecting Shanzi Reservoir.