Quantitative estimation of Secchi disk depth using the HJ-1B CCD image and in situ observations in Sishili Bay, China

Dingfeng Yu; Bin Zhou; Yanguo Fan; Tantan Li; Shouzhen Liang; Xiaoling Sun

doi:10.1117/12.2066806

10 December 2014 Quantitative estimation of Secchi disk depth using the HJ-1B CCD image and in situ observations in Sishili Bay, China

Dingfeng Yu, Bin Zhou, Yanguo Fan, Tantan Li, Shouzhen Liang, Xiaoling Sun

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Proceedings Volume 9261, Ocean Remote Sensing and Monitoring from Space; 92611A (2014) https://doi.org/10.1117/12.2066806
Event: SPIE Asia-Pacific Remote Sensing, 2014, Beijing, China

Abstract

Secchi disk depth (SDD) is an important optical property of water related to water quality and primary production. The traditional sampling method is not only time-consuming and labor-intensive but also limited in terms of temporal and spatial coverage, while remote sensing technology can deal with these limitations. In this study, models estimating SDD have been proposed based on the regression analysis between the HJ-1 satellite CCD image and synchronous in situ water quality measurements. The results illustrate the band ratio model of B3/B1 of CCD could be used to estimate Secchi depth in this region, with the mean relative error (MRE) of 8.6% and root mean square error (RMSE) of 0.1 m, respectively. This model has been applied to one image of HJ-1 satellite CCD, generating water transparency on June 23, 2009, which will be of immense value for environmental monitoring. In addition, SDD was deeper in offshore waters than in inshore waters. River runoffs, hydrodynamic environments, and marine aquaculture are the main factors influencing SDD in this area.

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Dingfeng Yu, Bin Zhou, Yanguo Fan, Tantan Li, Shouzhen Liang, and Xiaoling Sun "Quantitative estimation of Secchi disk depth using the HJ-1B CCD image and in situ observations in Sishili Bay, China", Proc. SPIE 9261, Ocean Remote Sensing and Monitoring from Space, 92611A (10 December 2014); https://doi.org/10.1117/12.2066806

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KEYWORDS

Water

Transparency

Charge-coupled devices

Satellites

Remote sensing

CCD image sensors

Earth observing sensors

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