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Journal of Applied Remote Sensing

Remote estimation of colored dissolved organic matter and chlorophyll-a in Lake Huron using Sentinel-2 measurements
Author(s): Jiang Chen; Weining Zhu; Yong Q. Tian; Qian Yu; Yuhan Zheng; Litong Huang
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Paper 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.

Paper Details

Date Published: 16 August 2017
PDF: 15 pages
J. Appl. Rem. Sens. 11(3) 036007 doi: 10.1117/1.JRS.11.036007
Published in: Journal of Applied Remote Sensing Volume 11, Issue 3
Show Author Affiliations
Jiang Chen, Zhejiang Univ. (China)
Weining Zhu, Zhejiang Univ. (China)
Yong Q. Tian, Central Michigan Univ. (United States)
Qian Yu, Univ. of Massachusetts Amherst (United States)
Yuhan Zheng, Zhejiang Univ. (China)
Litong Huang, Zhejiang Univ. (China)

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