Chlorophyll-a Concentration Inversion based on GF6-WFV Data in a Typical Lake Reservoir in Eastern China
The Gaofen-6 medium resolution wide-width camera(GF6-WFV)is designed with two red-edge bands,which has the potential to monitor chlorophyll a concentration in water.In this study,six typical lakes in eastern China,including Guanting Reservoir,Luhun Reservoir and Baiyangdian Lake,were selected as the study area,and measured spectrum and chlorophyll a concentration data were obtained from 141 sampling points.Based on the measured data,the parameters of four kinds of commonly used semi-empirical inversion models of chlorophyll a concentration were optimized and the model accuracy verified,and the optimal inversion model was selected.The results show that the red edge band Ⅰ(B5:710 nm)and red band(B3:660 nm)are newly added in GF6-WFV data.Which construct a two-band ratio 2BDA model with high inversion accuracy,correlation coefficient square(R2)is 0.89,the Mean Relative Error(MRE)is 34.71％,and the Root Mean Square Error(RMSE)is 13.29 mg/m3.The results show that the chlorophyll a concentration in water body can be effectively retrieved by using GF6-WFV image data.The inversion model of chlorophyll a concentration in water body established in this paper based on multi-lake and multi-temporal data has good applicability in typi-cal lake repositories in eastern China.
Gaofen-6 satelliteInland waterChlorophyll a concentrationInversion modelTypical lake reser-voir in eastern China
NETL
NSTL
万方数据
维普
