综合营养状态指数法在陶然亭湖富营养化评价中的应用

Application of Comprehensive Eutrophication State Index in Evaluation in Taoranting Lake

根据2006年-2010年陶然亭湖富营养化监测数据,采用综合营养状态指数法,分别从年均值及月份变化两方面对陶然亭湖的营养状态进行详细的分析和评价。结果表明,2006年-2010年陶然亭湖的营养状态指数呈现逐年下降的趋势,营养级别从重度富营养下降至中度富营养。湖泊富营养化程度随季节变化十分明显,富营养化程度在夏季和秋季形成高峰,冬季和春季一般较低。由于污水处理厂的再生水水质较差,补给到景观湖泊,加剧了富营养化程度。可以从污水处理厂加强对再生水质中氮、磷的处理和控制、利用生物-生态修复技术等方面采取措施来降低陶然亭湖的富营养化程度。

Base on the eutrophication monitoring data of Taoranting Lake from 2006 to 2010, this paper adopts the comprehensive eutrophication state index to make a detailed analysis and evaluation on the eutrophication status of Taoranting Lake. The results show that Taoranting Lake＇s eutrophication state declines from 2006 to 2010 and the eutrophication level dropped from severe eutrophic to middle eutrophic. The eutrophication degree of the lake changes with the seasons, most severe in summer and autumn, and low in winter and spring. Due to poor water quality of the reclaimed water from the sewage treatment plant, the renewable water supplies to the landscape lake exacerbate the eutrophication. The eutrophication degree of Taoranting Lake can be improved by controlling the concentration of nitrogen and phosphorus in the renewable water and improving measures on the biological- ecological restoration technology.