摘要
基于2009—2015年太湖西岸10个监测断面的8个水质指标数据,采用季节性Kendall检验法对其指标的浓度变化趋势进行分析,并用主成分分析法结合相关分析评价历年水质状况,分析影响太湖西岸水质的主要驱动因子。结果表明:(1)2009—2015年太湖西岸COD下降趋势显著,DO非显著上升,电导率、高锰酸盐指数、BOD5、氨氮、TP和TN均表现为高度显著下降趋势。(2)主成分分析从原始信息中提取出两个主成分,共解释了73.645%的结果,分别代表水质氮磷营养盐和有机污染。综合得分表明,2009—2015年太湖西岸水质呈逐年改善趋势。水质污染在空间上表现为北部向南部递减的趋势。(3)相关分析表明,氨氮和COD是影响该区域水质的主要驱动因子。
Based on 8 parameters monitored at 10 control sections of the west bank of Taihu Lake during 2009- 2015, seasonal Kendall test was used to analyze the changing trend of index concentration. Combined with related ana- lyses of water quality in calendar year, principal component analysis was used to analyses the dominating factors influ- encing the water quality in the west bank of Taihu Lake. The results showed that: (1) COD was significantly de- creased. DO was non-significantly risen. Electrical conductivity, permanganate index, BODs, ammonia nitrogen, TP and TN were highly significantly decreased in the west bank of Taihu Lake during 2009-2015. (2) 2 principal compo- nents were extracted from the original monitoring data by principal component analysis,which explained 73.645% of the results and represented of nitrogen and phosphorus nutrient salt and organic pollution of water quality. Compre- hensive score showed that water pollution improved year by year in the west bank of Taihu Lake during 2009-2015. The water pollution was showed a downtrend from the north to the south in space. (3) Correlation analysis showed that ammonia nitrogen and COD were the dominating factors influencing the water quality in this area.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2017年第10期1063-1066,1070,共5页
Environmental Pollution & Control
基金
国家水体污染控制与治理科技重大专项(No.2014ZX07305-002)
关键词
太湖西岸
水质变化
季节性Kendall检验法
主成分分析相关分析
the west bank of Lake Taihu
water quality change
seasonal Kendall test
principle component analysis
correlation analysis