基于粗糙集模型的芜湖市镜湖水体驱动因子分析及其富营养化评价

The Actuation Factor Analysis and Eutrophication Comments Based on the Rough Collection Model of Mirror Lake in Wuhu

通过实地监测,系统分析了一年的镜湖水质状况,并采用粗糙集模型分析了造成富营养化的驱动因子,在此基础上,用综合营养状态指数法对镜湖富营养化进行分析与评价.结果表明,总磷因子对镜湖水体富营养化的贡献率最大为35.12%,表明总磷是镜湖水体富营养化限制性元素;其次为总氮、叶绿素a,透明度的贡献率依次递减,而溶解氧几乎没有.TLI(∑)数值除6月份49.79以外,其余均在50以上,最高达到10月份的63.83,镜湖水质总体上有从轻富营养化向中富营养变化的趋势.最后进行了相关讨论,并对镜湖的富营养化控制提出了相应的建议.

On the basis of the water quality which analyzed through field survey in this paper and the driving factors analyzed by using the rough Collection Model, the eutrophication of Mirror Lake was studied and evaluated by TLI （∑）. The results showed that the factor of TP share 35. 12% in contributing rate of eutrophication, indicating the restricting element, and then ranked TN,Chla,SD degressively, DO was scarely any. The value of TLI （ ∑） were above 50 on average except for 49.79 in June. , and topping at 63.83 in October, which showed a tendency of water quality varying from mild eutrophication to moderate eutrophication.