16 August 2017 Remote estimation of colored dissolved organic matter and chlorophyll-a in Lake Huron using Sentinel-2 measurements
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Abstract
Colored dissolved organic matter (CDOM) and chlorophyll-a (Chla) are important water quality parameters and play crucial roles in aquatic environment. Remote sensing of CDOM and Chla concentrations for inland lakes is often limited by low spatial resolution. The newly launched Sentinel-2 satellite is equipped with high spatial resolution (10, 20, and 60 m). Empirical band ratio models were developed to derive CDOM and Chla concentrations in Lake Huron. The leave-one-out cross-validation method was used for model calibration and validation. The best CDOM retrieval algorithm is a B3/B5 model with accuracy coefficient of determination (R2)=0.884, root-mean-squared error (RMSE)=0.731  m−1, relative root-mean-squared error (RRMSE)=28.02%, and bias=−0.1  m−1. The best Chla retrieval algorithm is a B5/B4 model with accuracy R2=0.49, RMSE=9.972  mg/m3, RRMSE=48.47%, and bias=−0.116  mg/m3. Neural network models were further implemented to improve inversion accuracy. The applications of the two best band ratio models to Sentinel-2 imagery with 10  m×10  m pixel size presented the high potential of the sensor for monitoring water quality of inland lakes.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Jiang Chen, Jiang Chen, Weining Zhu, Weining Zhu, Yong Q. Tian, Yong Q. Tian, Qian Yu, Qian Yu, Yuhan Zheng, Yuhan Zheng, Litong Huang, Litong Huang, } "Remote estimation of colored dissolved organic matter and chlorophyll-a in Lake Huron using Sentinel-2 measurements," Journal of Applied Remote Sensing 11(3), 036007 (16 August 2017). https://doi.org/10.1117/1.JRS.11.036007 . Submission: Received: 27 May 2017; Accepted: 18 July 2017
Received: 27 May 2017; Accepted: 18 July 2017; Published: 16 August 2017
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