长江流域资源与环境 >> 2019, Vol. 28 >> Issue (05): 1205-1213.doi: 10.11870/cjlyzyyhj201905020

• 生态环境 • 上一篇    下一篇

基于Landsat影像巢湖蓝藻水华暴发时空变化特征及其驱动因素分析

李晟铭1,2,3,刘吉平1*,宋开山3,梁晨1,高佳1   

  1. (1. 吉林师范大学旅游与地理科学学院,吉林 四平 136000;2. 厦门闽矿测绘院,厦门 福建 361000;3.中国科学院湿地生态与环境重点实验室,中国科学院东北地理与农业生态研究所,吉林 长春 130102)
  • 出版日期:2019-05-20 发布日期:2019-05-22

Analysis on Spatial and Temporal Character of Algae Bloom in Lake Chaohu and Its Driving Factors Based on Landsat Imagery

LI Sheng-ming1,2,3,LIU Ji-ping1,SONG Kai-shan3,LIANG Chen1,GAO Jia1   

  1. (1. College of Tourism and Geography, Jilin Normal University, Siping 136000,China;2 .Xiamen Mine Surveying and Mapping Institute, Xiamen 361000,China;3. Northeast Institute of Geography and Agricultural Ecology, CAS, Changchun 130102,China)
  • Online:2019-05-20 Published:2019-05-22

摘要: 为研究巢湖蓝藻水华暴发的规律,该文以Landsat影像作为数据源,采用AFAI指数对藻华进行提取,分析1983~2017年巢湖蓝藻暴发的时空动态变化特征,并探讨巢湖藻华暴发的驱动因素。结果表明:1983~2017年巢湖藻华暴发频次、持续时间都在增加,历年最早暴发时间逐渐提前,藻华覆盖面积总体呈增加趋势。巢湖藻华主要分布在西北入湖口,西北部是巢湖藻华暴发的核心区。从其驱动力分析发现,风速、气温和大气压力是导致巢湖暴发重要影响因子,人口增长、GDP快速发展、施肥增加以及生活污水排放量增加是导致巢湖藻华现象日益严重的重要人为因素。

Abstract: In order to research the law of blue algae bloom in Lake Chaohu, this paper used the Landsat satellite image as a data source and extracted algal blooms by AFAI index to analyze the temporal and spatial variation of the blue algae bloom in Lake Chaohu and the main driving force of blue algal bloom outbreaks in Lake Chaohu was discussed. The results showed that the frequency and duration of outbreaks of blue algal blooms in Lake Chaohu from 1983 to 2017 increased; the earliest time of the outbreaks in the calendar years gradually advanced; the area covered by algal blooms showed an overall increase trend. Lake Chaohu algae is mainly distributed in the northwest entrance to the lake, and the northwest is the core area of blue algal blooms in Lake Chaohu. From the analysis of its driving forces, the atmospheric pressure, air temperature and wind speed were important factors affecting the outbreak of Lake Chaohu. In addition, the Lake Chaohu population growth, rapid GDP growth, increased fertilization and increased domestic sewage discharge were important human factors that caused the blue algae bloom phenomenon in Lake Chaohu to become increasingly serious.

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