摘要
监测了长春南湖底泥疏浚后的DO、NH4＿N、NO2＿N、NO3＿N、BOD5、CODCr、TN、TP、SS、pH、SD和水温等12项水化学指标。用因子分析方法找出了底泥疏浚前后影响南湖水质的主要因子,分析了底泥疏浚前后南湖水质变化的特征和底泥疏浚对南湖水质的影响,分析结果表明,南湖疏浚前主要污染物是总磷,疏浚后总磷对水质的影响降低,悬浮物作用增大。
Located in Changchun, Jili Province, Nanhu Lake is a small shallow and man-made eutrophica lake. Though the countermeasures, such as controlling outer pollution source, especially poing-source and ecological engineering had been adopted to deal with the eutrophication of Nanhu Lake, it still was in mesotrophic. Therefore, sediment dredging had been employed in practice since 2000. In order to assess the effects of the sediment dredging, twelve indices of water quality, including dissolved oxygen(DO),NH\-3-N,NO\-2-N,NO\-3-N,five days biochemical oxygen demanded(BOD\-5), chemical oxygen demanded(COD\-\{Cr\}),total nitrogen(TN),total phosphorus(TP),solid suspended(SS),pH value,Scheei-depth(SD) and water temperature(WT), had been investigated in 2002. However, these indices were respectively, they were hard to describe the integrated effects of the sediment dredging. In this paper, based on the monitoring data of post-dredging in 2002 and data collected of pre_dredging in 1998, the water quality of Nanhu Lake was analyzed by applying factor analysis method, which comprehensively considered twelve indices of water quality. Results showed that TP was the most inportant factor before sediment dredging, and the role of SS increased after sediment dredging. Moreover, results also presented that the method was comprehensive and efficient in analyzing the water quality of pre- and post-dredging.
出处
《中国环境监测》
CAS
CSCD
北大核心
2004年第2期10-13,共4页
Environmental Monitoring in China
基金
吉林省环保局项目(2002-)
长春市科学技术局项目(02 069504)
关键词
因子分析
底泥疏浚
水质动态变化
南湖
factor analysis
sediment dredging
dynamics water quality
Nanhu Lake
