仙女湖水质变化特征及富营养化分析与评价

Analysis and Evaluation of Water Quality Change Characteristics and Eutrophication of Xiannv Lake

基于2016~2020年仙女湖5个主要监测点的逐月水质监测数据,采用水污染指数法和综合营养状态指数法综合评价了仙女湖水质变化特征。结果显示,仙女湖部分水质指标存在显著的时空差异,丰水期水体水质最差,平水期水质相对较好,但均未达到《地表水环境质量标准》(GB3838-2002)中Ⅲ类水标准,TP、TN是仙女湖的主要污染因子。仙女湖水体整体处于轻度富营养化状态,近年来呈逐年好转变化。

Based on the monthly water quality monitoring data of five main monitoring sites in Xiannv Lake from 2016 to 2020,water pollution index method and comprehensive nutritional state index method were used to evaluate the change characteristics of water quality synthetically.The results show that there were significant spatial and temporal differences in some water quality indexes of Xiannv Lake,the water quality was the worst in wet season and relatively good in level season.However,they did not meet the classⅢwater standard in the environmental quality standard for surface water(GB3838-2002),the TP and TN were the main pollution factors.The Xiannv Lake was in the state of mild eutrophication but are gradually getting better over the years.