Saturation of water reflectance in extremely turbid media based on field measurements, satellite data and bio-optical modelling

Yafei Luo , David Doxaran (1) , Kevin Ruddick (2) , Fang Shen , Bernard Gentili (1) , Liwen Yan , Haijun Huang

1 LOV - Laboratoire d'océanographie de Villefranche
2 IRSNB - Institut Royal des Sciences Naturelles de Belgique

Evidence of water reflectance saturation in extremely turbid media is highlighted based on both field measurements and satellite data corrected for atmospheric effects. This saturation is obvious in visible spectral bands, i.e., in the blue, green and even red spectral regions when the concentration of suspended particulate matter (SPM) reaches then exceeds 100 to 1000 g.m −3. The validity of several bio-optical semi-analytical models is assessed in the case of highly turbid waters, based on comparisons with outputs of the Hydrolight radiative transfer model. The most suitable models allow to reproduce the observed saturation and, by inversion, to retrieve information on the SPM mass-specific inherent optical properties.

Domaines: Ingénierie de l'environnement

Yafei Luo, David Doxaran, Kevin Ruddick, Fang Shen, Bernard Gentili, et al.. Saturation of water reflectance in extremely turbid media based on field measurements, satellite data and bio-optical modelling. Optics Express, 2018, 26 (8), pp.10435. ⟨10.1364/OE.26.010435⟩. ⟨hal-02352140⟩