摘要
对晋阳湖水、底泥进行了采样、分析,研究了晋阳湖目前的富营养化状态;并对晋阳湖主要污染源及富营养化成因进行了研究.结果表明:晋阳湖的主要污染物为COD(Chemical oxygen demand)、总磷(Total phosphorus)、总氮(Total nitrate);COD含量均值为95mg/L,总氮含量在2mg/L～4mg/L之间变化,分别超出国家《地表水环境质量标准》V类标准所规定的40mg/L和2mg/L的标准;多个采样点总磷的含量超出《地表水环境质量标准》规定的Ⅳ类水标准0.1mg/L,维持在0.2mg/L以下.晋阳湖水质处于中度富营养化状态,在一定条件下极有可能发生藻华.导致晋阳湖富营养化的主要污染源为湖内水产的过度养殖、补水时污水的进入、内源磷的释放以及湖水自身的蒸发浓缩作用.
Water and bed-sediment Samples from Jinyang Lake were collected and analysed;The major pollutants in the lakeare COD （Chemical oxygen demand）、TP （Total phosphorus）and TN （Total nitrate）;and thermal pollution composes anotherimportant characteristic of the lake,which makes the unique ecological state of the lake. The average content of COD and TN inwater is 95mg/L,and ranged from 2 mg/L to 4 mg/L respectively,which is above the V Class of ＂Surface Water EnvironmentalQuality Standard＂40mg/L for COD and 2mg/L for TN respectively. Total phosphorus of many samples were between 0.1mg/Land0.2mg/L in the water,which was beyond the Class Ⅳof＂Surface Water Environmental Quality Standard＂0.1mg/L for TP. The lakeis undergoing a state of middle eutrophication;and algae bloom would be extremely possible to take place under certain conditions.The major sources of water pollution were identified as： heavy fish farming,waste waters induced,the release of endogenousphosphorus and the concentration effect caused by evaporation.
出处
《晋中学院学报》
2010年第3期79-82,共4页
Journal of Jinzhong University
关键词
富营养化
晋阳湖
污染
eutrophication
Jinyang Lake
Pollution
