洪泽湖水体富营养化时空分布特征与影响因素分析
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摘要
通过2014年—2017年对洪泽湖12个水质断面定期调查,采用营养状态指数(TLI)综合评价其水体富营养状态,同时应用主成分分析方法(PCA)分析其富营养化状态的时空变化特征。结果表明,洪泽湖70%以上的调查断面水质全年处于轻度富营养化状态,夏季是其富营养化最严重的季节;洪泽湖年内水体水质差异较大,而其水华特征并未呈现明显差异;洪泽湖富营养化很大程度上受制于营养盐的积累程度,并与湖泊透明度呈现极显著的负相关关系(p<0.001),与湖水pH值呈现极显著的正相关关系。
Based on periodic investigation on 12 water quality monitoring sections in Hongze Lake during 2014—2017, the eutrophic state of water body was evaluated via trophic level index(TLI), and the temporal-spatial distribution characteristics of eutrophication was analyzed by principal component analysis method. Results showed that the water quality of over 70% monitoring sections was slightly eutrophication, and it was the most serious in summer. The water quality was quite different during a whole year in Hongze Lake, but the algal bloom was not. The eutrophication level in Hongze Lake greatly depended on the accumulation of nutritive salts. It had significant negative correlation with transparency(p<0.001)and significant positive correlation with pH value of the lake water.
Based on periodic investigation on 12 water quality monitoring sections in Hongze Lake during 2014—2017, the eutrophic state of water body was evaluated via trophic level index(TLI), and the temporal-spatial distribution characteristics of eutrophication was analyzed by principal component analysis method. Results showed that the water quality of over 70% monitoring sections was slightly eutrophication, and it was the most serious in summer. The water quality was quite different during a whole year in Hongze Lake, but the algal bloom was not. The eutrophication level in Hongze Lake greatly depended on the accumulation of nutritive salts. It had significant negative correlation with transparency(p<0.001)and significant positive correlation with pH value of the lake water.
引文
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[3] 李为,都雪,林明利,等.基于PCA和SOM网络的洪泽湖水质时空变化特征分析[J].长江流域资源与环境,2013,22(12):1593-1600.
[4] 崔彩霞,花卫华,袁广旺,等.洪泽湖水质现状评价与趋势分析[J].中国资源综合利用,2013,31(10):44-47.
[5] 叶春,李春华,王博,等.洪泽湖健康水生态系统构建方案探讨[J].湖泊科学,2011,23(5):725-730.
[6] 葛绪广,王国祥.洪泽湖面临的生态环境问题及其成因[J].人民长江,2008,39(1):28-30.
[7] 王兆群,张宁红,张咏,等.洪泽湖水质富营养化评价[J].环境监控与预警,2010,2(6):31-35.
[8] 范亚民,何华春,崔云霞,等.洪泽湖水域的环境演变遥感分析[J].污染防治技术,2008,21(6):29-33.
[9] 吴延东,刘绪庆,陈飞龙.洪泽湖水质状况的主成分分析和聚类分析[J].淮阴工学院学报,2010,19(1):71-76.
[10] 王伟,樊祥科,黄春贵,等.洪泽湖渔业水质监测点位优化布设[J].环境监测管理与技术,2015,27(2):53-56.
[11] 张利民,刘伟京,尤本胜,等.洪泽湖流域生态环境问题及治理对策[J].环境监测管理与技术,2010,22(4):30-35.
[12] 陈伟民.湖泊生态系统观测方法[M].北京:中国环境科学出版社,2005.
[13] 陈宇炜,陈开宁,胡耀辉.浮游植物叶绿素a测定的“热乙醇法”及其测定误差的探讨[J].湖泊科学,2006,18(5):550-552.
[14] 陈明,孙洁梅,李敏.水体中藻类叶绿素a提取方法的比较[J].环境监测管理与技术,2017,29(4):57-59.
[15] 高敏,胡维平,邓建才,等.太湖典型沉水植物生理指标对水质的响应[J].环境科学,2016,37(12):4570-4576.
[16] 朱广伟.太湖水质的时空分异特征及其与水华的关系[J].长江流域资源与环境,2009,18(5):439-445.
[17] 刘远书,曹鹏飞.论南水北调东线洪泽湖蓝藻暴发的可能性[J].水利规划与设计,2014(1):9-12.
[18] 赵长森,夏军,王纲胜,等.淮河流域水生态环境现状评价与分析[J].环境工程学报,2008,2(12):1698-1704.