An assessment of the accuracy and precision of water quality parameters retrieved with the matrix inversion method
Article
Article Title | An assessment of the accuracy and precision of water quality parameters retrieved with the matrix inversion method |
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ERA Journal ID | 40788 |
Article Category | Article |
Authors | Campbell, Glenn (Author) and Phinn, Stuart R. (Author) |
Journal Title | Limnology and Oceanography: Methods |
Journal Citation | 8, pp. 16-29 |
Number of Pages | 14 |
Year | 2010 |
Place of Publication | United States |
ISSN | 1541-5856 |
Digital Object Identifier (DOI) | https://doi.org/10.4319/lom.2010.8.16 |
Web Address (URL) | https://aslopubs.onlinelibrary.wiley.com/doi/abs/10.4319/lom.2010.8.16 |
Abstract | There is an increasing demand for quantitative inland water quality observations from satellites. One approach to estimate water quality constituent (chlorophyll and other pigments, total suspended material, and colored dissolved organic matter) concentrations from remote sensing radiance measured over inland waters is to apply a Matrix Inversion Method (MIM). Using the Hydrolight® radiative transfer model and typical water quality constituent concentrations from subtropical Wivenhoe Dam, Australia, this article demonstrates that significant improvements in the accuracy and precision of retrieved water quality constituent values can be obtained by using semianalytically estimated values for the proportionality factor that are calculated separately for each spectral band of the MERIS sensor. Furthermore, it shows that overdetermined systems of equations can be used to mitigate the effect of unknown and endemic sources of error in the remote sensing system. The residuals left after the inversion of the reflectance spectrum can also be used to assign a reliability measure to the retrievals of total suspended material (TSM) and colored dissolved organic matter (CDOM), but not for chlorophyll a. The results of this study may be used to improve algorithms for the remote sensing of water quality for freshwater impoundments. |
Keywords | matrix inversion method; water quality; error assessment; MERIS; inland waters |
ANZSRC Field of Research 2020 | 400499. Chemical engineering not elsewhere classified |
401304. Photogrammetry and remote sensing | |
410404. Environmental management | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Department of Surveying and Land Information |
Australian Centre for Sustainable Catchments |
https://research.usq.edu.au/item/9z930/an-assessment-of-the-accuracy-and-precision-of-water-quality-parameters-retrieved-with-the-matrix-inversion-method
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