华中师范大学学报（自然科学版）2018，Vol.52Issue(3)：409-415,7.DOI:10.19603/j.cnki.1000-1190.2018.03.018
面向GF-5卫星高光谱传感器的浑浊水体叶绿素a浓度反演算法研究——以鄱阳湖为例
A novel chlorophyll-a inversion model in turbid water for GF-5 satellite hyperspectral sensor——a case in Poyang Lake
摘要
Abstract
In order to analyze the potential of GaoFen-5(GF-5) hyperspectral satellite data for water color Remote Sensing application in inland waters,134 in situ spectral data sets by SVC HR1024 spectrometer,corresponding chlorophyll-a (Chl-a) concentration,and total suspended sediments (TSS) concentration were obtained from Poyang Lake in 2009,2011,and 2016.Considering spectral response differences of Chl-a variation in high turbid water area,we uti lized Normalized Difference Chlorophyll a Index (NDCI) for optical partition.Then,the spec tral simulation and difference processing were carried out for hyperspectral cross-derivative inversion of Chl a concentration.Our results are that the optical partitioning is helpful to improve the inversion accuracy.The coefficient of determination (R2),Root Mean Square Error (RMSE) and Mean Relative Error (MRE) of inversion model is 0.82,1.12,and 0.32 in lowturbid water (NDCI≥0.06),separately.However,the R2 of inversion model is only 0.37 in the whole lake area.Compared with the previous optimal multi-band inversion model (R2 =0.76) in Poyang Lake,our method is more effective which used original spectrum and difference spectrum (first difference,second difference) in the central wavelengths at 495,591,675,679,684,688,692,and 696 nm to establish a cross derivative multi-band combination inversion model.However,further study is still needed for the hyperspectral inversion potential in Chl-a concentration in high turbid water (NDCI ＜0.06) with TSS concentration higher than 50 mg/ L.关键词
GF-5/鄱阳湖/叶绿素a/高光谱反演Key words
GF-5/Poyang Lake/chlorophyll-a/hyperspectral inversion分类
天文与地球科学引用本文复制引用
邓实权,田礼乔,李建,陈晓玲,孙兆华,张琍,韦安娜..面向GF-5卫星高光谱传感器的浑浊水体叶绿素a浓度反演算法研究——以鄱阳湖为例[J].华中师范大学学报（自然科学版）,2018,52(3):409-415,7.基金项目
国家重点研发计划项目(2018yFB05044904) （2018yFB05044904）
高分辨率对地观测系统重大专项项目(41-Y20A31-9003-15/17) （41-Y20A31-9003-15/17）
国家自然科学基金项目(41571344 （）
41331174 （）
41701379 （）
41071261 （）
40906092 （）
40971193 （）
41101415 （）
41401388 （）
41206169 （）
41406205) （）
国家重点研发计划项目(2016YFC0200900) （2016YFC0200900）
江西省自然科学基金项目(20161BAB213074). （20161BAB213074）
