引用本文:张悦,陈冰,王晨希,王琳,李旭文,陆鸿飞,牛志春,姜晟,李继影,崔嘉宇,余悠然.基于Sentinel-2与随机森林算法的太湖水生植被分布监测[J].环境监控与预警,2023,(6):42-49
ZHANG Yue,CHEN Bing,WANG Chengxi,WANG Lin,LI Xuwen,LU Hongfei,NIU Zhichun,JIANG sheng,LI Jiying,CUI Jiayu,YU Youran.Monitoring Aquatic Vegetation Distribution of Taihu Lake from Sentinel-2 and Random Forest Algorithm[J].Environmental Monitoring and Forewarning,2023,(6):42-49
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基于Sentinel-2与随机森林算法的太湖水生植被分布监测
张悦1,2,陈冰3,李旭文1*,牛志春2,姜晟1,李继影4,崔嘉宇1,余悠然1
1. 江苏省环境监测中心,江苏 南京 210019;2. 江苏省生态环境大数据有限公司,江苏 南京 210019;3. 南京信息工程大学,江苏 南京 210044;4. 江苏省苏州环境监测中心,江苏 苏州 215004
摘要:
基于2018—2021年太湖地区哨兵2号(Sentinel-2)卫星遥感影像和随机森林算法,结合植被敏感指数,开展太湖水生植被分布监测,综合分析了水生植被的时空变化特征,初步揭示了太湖水生植被的动态变化。结果表明,太湖水生植被分布面积有逐年上升的趋势,且年间变化具有明显的单峰型特征,表现为春季沉寂,夏季快速增长,秋季达到暴发期,冬季面积开始减退;太湖水生植被主要分布于东太湖、东部沿岸和贡湖,类型以沉水植被为主,其中浮叶植被主要分布于东太湖,挺水植被主要分布于东太湖沿岸的浅水区域;沉水植被主要分布于东部沿岸和贡湖;水生植被主要分布的东太湖水域,其水质总体优于太湖其他水域。
关键词:  哨兵2号卫星  随机森林模型  水生植被  水质  太湖
DOI:10.3969/j.issn.1674-6732.2023.06.007
分类号:X835
基金项目:江苏省环保科研课题(2019010);江苏省环境监测科研基金项目(2206,2207,2216,2211)
Monitoring Aquatic Vegetation Distribution of Taihu Lake from Sentinel-2 and Random Forest Algorithm
ZHANG Yue1,2, CHEN Bing3, LI Xuwen1*, NIU Zhichun2, JIANG sheng1,LI Jiying4, CUI Jiayu1, YU Youran1
1.Jiangsu Environmental Monitoring Center, Nanjing, Jiangsu 210019,China; 2. Jiangsu Ecological Environment Big Data Co., Ltd.,Nanjing, Jiangsu 210019, China;3. Nanjing University of Information Science & Technology, Nanjing, Jiangsu 210044,China; 4. Jiangsu Suzhou Environmental Monitoring Center,Suzhou,Jiangsu 215004,China
Abstract:
Based on Sentinel-2 images and random forest algorithm from 2018 to 2021 and combined with vegetation sensitivity index, this paper comprehensively analyzed the spatial and temporal characteristics of aquatic vegetation, and preliminary revealed the dynamic changes of aquatic vegetation in Taihu lake. The results show that the distribution area of aquatic vegetation in Taihu Lake increased year by year and showed obvious single peak pattern: quiet in spring, rapid growth in summer, outbreak in autumn, and decline in winter. The aquatic vegetation is mainly distributed in east Taihu Lake, east coast and Gonghu Lake. The floating leaf vegetation is mainly distributed in East Taihu Lake, the emergent water vegetation is mainly located in the shallow water area along east Taihu Lake, and the submerged vegetation is mainly in the east coast and Gonghu Lake. The water quality of East Taihu Lake, where aquatic plants are mainly distributed, is better than that of other waters in Taihu Lake.
Key words:  Sentinel 2  Random forest  Aquatic vegetation  Water quality  Taihu lake