摘要
基于2014年5月和8月长江口及其附近海域关键水质环境要素分布特征进行聚类,将研究区域分成一区和二区,并对不同时期两区域内COD和TOC的来源和相关性进行分析。结果表明,一区COD与TOC表现出同源性,与油类和硝酸盐均存在正相关性,受陆地径流输入影响显著;二区受外海水的影响增大,同时受到一定的生物活动影响。2014年5月和8月,两个分区内的COD与TOC均呈现显著线性相关,但COD/TOC比值存在一定差异。5月份,一区的COD/TOC值要高于二区;8月份,二区的COD/TOC值要高于一区。
Based on in-situ observation in May and August 2014,a regional partition based on several key indicators over the Changjiang estuary and its adjacent areas was performed. Cluster analysis was used to identify the divisions. As a result,two zoning areas bearing specific hydrological and chemical characteristics were finally generated. Then the sources and the correlation between COD and TOC in different periods were discussed. The results show that the COD and TOC present positive correlation with oil and nitrates in the first zone,which was significantly influenced by the land runoff input. In the second zone,the distribution of COD and TOC is highly affected by the seawater and certain biological activities. In May and August 2014,the data show a good linear correlation between COD and TOC in the two zoning areas,but the ratio of COD / TOC in the first zone is higher than the second zone in May 2014,on the contrary in August 2014.
出处
《化学试剂》
CAS
北大核心
2016年第8期759-762,共4页
Chemical Reagents
基金
上海市科委科研计划项目(12231203300
MATHAB-2014001)
关键词
长江口
聚类分析
化学需氧量
Changjiang estuary
clustering analysis
chemical oxygen demand
