Seasonal Variation of Water Color at 30m Spatial Resolution in 42 Urban Lakes
Eutrophication has been a serious problem in Chinas urban lakes.In this study,to monitor 42 lakes trophic state in Wuhan city,a Forel-Ule index(FUI)method based on Landsat 8 OLI data was proposed among different seasons.The result shown that the FUI calculated from Landsat 8 OLI reflectance spectral(Rrs)can substantially represent the lakes TSI,with accuracy of 79.37%for in situ experiment TSI dataset.And the TSI in urban lakes can be divided into 3 categories by a decision tree(oligotrophic,FUI 1-6; mesotrophic,FUI 7-9; trophic,FUI 10-21).Seasonal dynamics show that the trophic state of 42 lakes in summer is significant higher than other seasons,while 99.65%lakes are under the state of trophic.And the order of average FUI is summer(19)>spring(18)>fall(11)> winter(10).Our results can serve as an example for other lakes lie in Yangtze River basin,and support the formulation of effective strategies to reduce seasonal eutrophication.
Trophic state Urban lake Landsat 8 OLI Forel-Ule index
Qi CHEN Mu-tao HAUNG Xiao-juan LI Xiao-dong TANG
College of Hydropower and Information Engineering,Huazhong University of Science and Technology,NO.1037,Luoyu Road,Wuhan 430074,China
国际会议
长沙
英文
368-373
2019-08-30（万方平台首次上网日期，不代表论文的发表时间）