摘要
东平县环境监测站从1996年开始,对每年发生的第一场洪水进行水质跟踪监测。结果表明,SS是主要污染物,涨洪段和洪峰段监测值分别超过《渔业水质标准》(GB1160789)181倍、215倍,TN的高峰值出现在退水段1和退水段2,分别超过《地表水环境质量标准》(GB38382002)Ⅲ级标准6 54倍、5 68倍,洪峰的COD监测值为133mg/L,超标5 65倍。洪水入湖后湖区水质监测结果表明,老湖镇入湖口河道污染最重,除上游洪水带入大量污染物外,洪水入湖后冲击养殖区,使大量含有机质的底质泛起,加重了入湖口附近的水污染。指出,悬浮物的骤然增加和溶解氧的持续过低,大汶河流域内地表水水质恶化以及养殖区规划不合理和养殖方式不当是导致污染事故发生的主要原因。
From 1996, tracking monitoring was undertaken once every year for the flood's water quality. SS was the main pollutant, its value was181 times and 215 times more than the limiting value in The Fishery Water Quality Standard (GB 1160789)during the period of flood rising and flood peak respectively. The peak value of TN occurred during the ebb period one and ebb period two, were 6.54 and 5.68 times more than the Ⅲ level water's quality of Surface Water Quality Standard (GB 38382002)respectively. The COD value of peak flood was 133 mg/L, 5.65 times more than the limiting value. The intrant river's pollution in Laohuzheng was great. After study, the main reason of pollution accident included the increase of SS the decrease of DO, the deterioration of surface water's quality and ir-rational fishery area.
出处
《环境监测管理与技术》
2004年第5期19-21,24,共4页
The Administration and Technique of Environmental Monitoring
关键词
突发性
污染事故
水质
调查
东平湖
Sudden
Pollution accident
Water quality
Survey
The Lake of Dongping
