典型湖库叶绿素a含量测定及富营养化分析
Chlorophyll a Content Determination and Eutrophication Analysis of Typical Lakes and Reservoirs
吴昊 1陈珍 2赵桂芳 2李艳2
作者信息
- 1. 长江流域生态环境监督管理局南水北调中线水源生态环境科学研究中心,湖北十堰 442000
- 2. 汉江师范学院,湖北十堰 442000
- 折叠
摘要
水体富营养化是由自然因素和人为因素的共同作用造成的,其影响水体中营养盐的含量,导致淡水湖泊中氮、磷、钾等元素含量逐渐升高,从而使藻类植物过度增殖.叶绿素a含量是评价水体富营养化状态的重要指标之一.对我国典型大型湖库丹江口水库6个点位的地表水水体中叶绿素a含量进行了提取测定.利用综合营养状态指数法计算丹江口水库营养状态指数.结果表明,6个点位的地表水中叶绿素a浓度范围在1.17～4.31 μg/L之间,综合营养状态指数在32.6～38.1之间,湖库营养状态等级总体上处于中营养状态,有进一步富营养化的风险.
Abstract
The eutrophication of a water was caused by the combined action of natural and human factors,which affects the content of nutrients in the water,resulting in a gradual increase in the content of nitrogen,phosphorus,potassium and other elements in freshwater lakes,thus causing the process of excessive proliferation of algae.Chlorophyll-a con-tent is one of the important indicators to evaluate the eutrophication status of water.In this paper,the content of chloro-phyll-a in the surface water of Danjiangkou Reservoir,a typical large lake and reservoir in China,was extracted and determined at 6 sites.The comprehensive nutritional status index method is used to calculate the nutritional status index of Danjiangkou Reservoir.The results show that the concentration range of chlorophyll-a in surface water at 6 sites is 1.17～4.31 μg/L,the comprehensive trophic status index is between 32.6～38.1,and the trophic status level of lakes and reservoirs is generally in the middle trophic status,with the risk of further eutrophication.
关键词
湖库/叶绿素a/富营养化/营养状态指数Key words
lake reservoir/chlorophyll a/eutrophication/trophic state index引用本文复制引用
基金项目
汉江师范学院校级科研项目(XJ2021S05)
出版年
2024
NETL
NSTL
万方数据