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A Multivariate Model for Coastal Water Quality Mapping Using Satellite Remote Sensing Images
Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan
Hydrotech Research Laboratory, National Taiwan University, Taipei, Taiwan
Water Resources Agency, Taipei, Taiwan
* Author to whom correspondence should be addressed.
Received: 11 September 2008; in revised form: 27 September 2008 / Accepted: 6 October 2008 / Published: 10 October 2008
Abstract: his study demonstrates the feasibility of coastal water quality mapping using satellite remote sensing images. Water quality sampling campaigns were conducted over a coastal area in northern Taiwan for measurements of three water quality variables including Secchi disk depth, turbidity, and total suspended solids. SPOT satellite images nearly concurrent with the water quality sampling campaigns were also acquired. A spectral reflectance estimation scheme proposed in this study was applied to SPOT multispectral images for estimation of the sea surface reflectance. Two models, univariate and multivariate, for water quality estimation using the sea surface reflectance derived from SPOT images were established. The multivariate model takes into consideration the wavelength-dependent combined effect of individual seawater constituents on the sea surface reflectance and is superior over the univariate model. Finally, quantitative coastal water quality mapping was accomplished by substituting the pixel-specific spectral reflectance into the multivariate water quality estimation model.
Keywords: Remote sensing; coastal water quality; environmental monitoring; water quality mapping^
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MDPI and ACS Style
Su, Y.-F.; Liou, J.-J.; Hou, J.-C.; Hung, W.-C.; Hsu, S.-M.; Lien, Y.-T.; Su, M.-D.; Cheng, K.-S.; Wang, Y.-F. A Multivariate Model for Coastal Water Quality Mapping Using Satellite Remote Sensing Images. Sensors 2008, 8, 6321-6339.
Su Y-F, Liou J-J, Hou J-C, Hung W-C, Hsu S-M, Lien Y-T, Su M-D, Cheng K-S, Wang Y-F. A Multivariate Model for Coastal Water Quality Mapping Using Satellite Remote Sensing Images. Sensors. 2008; 8(10):6321-6339.
Su, Yuan-Fong; Liou, Jun-Jih; Hou, Ju-Chen; Hung, Wei-Chun; Hsu, Shu-Mei; Lien, Yi-Ting; Su, Ming-Daw; Cheng, Ke-Sheng; Wang, Yeng-Fung. 2008. "A Multivariate Model for Coastal Water Quality Mapping Using Satellite Remote Sensing Images." Sensors 8, no. 10: 6321-6339.