入湖污染物量对阳澄湖水质及浮游生物的影响研究

发布时间：2018-05-16 03:10

本文选题：入湖河道污染物量 + 湖体水质　；参考：《苏州科技学院》2015年硕士论文

【摘要】：阳澄湖地处长江三角洲太湖平原,位于苏州市区的东北,是苏州地区第二大湖泊,对苏州市的居民生活用水及工农业生产具有十分重要的作用。随着社会经济的飞速发展,工农业生产和人民生活污水急剧增加,大量污水进入了阳澄湖,对湖体水质及水生浮游生物产生了较为严重的影响。论文通过计算环湖河道各月流进入阳澄湖CODMn、TN、TP的量,并同步监测三个湖区的水质及浮游植物的群落结构,研究入湖污染物量对阳澄湖水质及浮游植物的影响。结果表明:1、各湖区入湖河道污染物量由多到少排列分别为:阳澄西湖、阳澄中湖、阳澄东湖,且阳澄西湖入湖污染物总量远大于其余两个湖区,为污染物的主要受水体。2、阳澄湖浮游植物以硅藻和绿藻为主要优势种群,浮游植物的生物密度和生物量夏秋季高于冬春季,生物多样性指数在2.06~2.34之间,均匀度指数在0.69~0.78之间。3、阳澄湖三个湖区入湖河道污染物量和水体营养化水平基本呈正相关,浮游植物多样性和水体营养化水平也以正相关为主,但相关性大多数为不显著。其中,阳澄西湖水体营养化指数和浮游植物多样性指数两者存在显著的线性正相关关系,阳澄东湖入湖总磷与浮游植物多样性指数存在显著的线性负相关。
[Abstract]:Yangcheng Lake, located in the Taihu Plain of the Yangtze River Delta and in the northeast of Suzhou City, is the second largest lake in Suzhou, which plays an important role in the water consumption of Suzhou residents and the production of industry and agriculture. With the rapid development of social economy, industrial and agricultural production and people's domestic sewage increased rapidly, a large number of sewage into Yangcheng Lake, the lake water quality and aquatic plankton has a more serious impact. In this paper, the amount of water quality and phytoplankton community structure of the three lakes were monitored synchronously by calculating the amount of CODMnnTTP entering Yangcheng Lake each month, and the effect of pollutant quantity on the water quality and phytoplankton of Yangcheng Lake was studied. The results show that the amount of pollutants in the rivers of each lake region is arranged from more to less: Yangcheng West Lake, Yangcheng Middle Lake, Yangcheng East Lake, and Yangcheng West Lake is much larger than the other two lakes. In Yangcheng Lake, the dominant species of phytoplankton were diatoms and green algae. The biomass and density of phytoplankton were higher in summer and autumn than in winter and spring, and the biodiversity index was between 2.06 and 2.34. The evenness index was between 0.69 and 0.78. There was a positive correlation between the amount of pollutants and the nutrient level of water body in Yangcheng Lake. The diversity of phytoplankton and the nutrient level of water were also positively correlated, but the correlation was not significant. There was a significant linear positive correlation between nutrient index and phytoplankton diversity index in Yangcheng Lake, and a significant linear negative correlation between total phosphorus and phytoplankton diversity index in Yangcheng Lake.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X524

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