Deriving inherent optical properties and associated inversion-uncertainties in the Dutch Lakes

M.S. Salama, A.G. Dekker, Z. Su, C.M.M. Mannaerts, W. Verhoef

Research output: Contribution to journalArticleAcademicpeer-review

28 Citations (Scopus)

Abstract

Remote sensing of water quality in inland waters requires reliable retrieval algorithms, accurate atmospheric correction and consistent method for uncertainty estimation. In this paper, the GSM semi-analytical inversion model is modified for inland waters to derive inherent optical properties (IOPs) and their spectral dependencies from air and space borne data. The modified model was validated using two data sets from the Veluwe and the Vecht Dutch lakes. For the Veluwe lakes, the model was able to derive a linear relationship between measured concentrations and estimated IOPs with R2 values above 0.7 for chlorophyll-a (Chl-a) and up to 0.9 for suspended particulate matters (SPM). In the Vecht lakes, the modified model derived accurate values of IOPs. The R2 values were 0.89 for Chl-a and up to 0.95 for SPM. The RMSE values were 0.93 mg m-3 and 0.56 g m-3 for Chl-a and SPM respectively. Finally, the IOPs of the Veluwe lakes are derived from multi-spectral, ocean color and hyperspectral airborne data. Inversion-uncertainties of the derived IOPs were also estimated using a standard nonlinear regression technique. The study shows that inversion-uncertainties of remote sensing derived IOPs are proportional to water turbidity
Original languageEnglish
Pages (from-to)1113-1121
JournalHydrology and Earth System Sciences
Volume13
Issue number7
DOIs
Publication statusPublished - 2009

Keywords

  • resolution imaging spectrometer
  • dissolved organic-matter
  • zone color scanner
  • ocean color
  • chlorophyll-a
  • atmospheric correction
  • water-quality
  • coastal waters
  • model
  • absorption

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