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Remote Sens. 2014, 6(10), 9530-9551; doi:10.3390/rs6109530

Retrieval of Particle Scattering Coefficients and Concentrations by Genetic Algorithms in Stratified Lake Water

1
Eawag, Swiss Federal Institute of Aquatic Science and Technology, Seestrasse 79, CH-6047 Kastanienbaum, Switzerland
2
Brockmann Consult GmbH, Max-Planck-Str. 2, D-21502 Geesthacht, Germany
3
Chair of Environmental Protection and Management, Warsaw University of Technology, PL-00-661 Warsaw, Poland
4
Physics of Aquatic Systems Laboratory, Margaretha Kamprad Chair, EPFL-ENAC-IEE-APHYS, CH-1015 Lausanne, Switzerland
*
Author to whom correspondence should be addressed.
Received: 26 May 2014 / Revised: 23 September 2014 / Accepted: 29 September 2014 / Published: 9 October 2014
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Abstract

We retrieved the mass-specific scattering coefficient b*sm(λ) = 0.60·(λ/650)−1.82 of the inhomogeneous and optically complex water column of eastern Lake Constance in May 2012. In-situ measured and modelled remote-sensing reflectance Rrs(λ) were matched via a parameter search procedure using genetic algorithms. The optical modelling consisted of solving the azimuthally-averaged Radiative Transfer Equation, forced with in-situ suspended matter concentration (sm) data. b*sm(λ) was univocally determined at red wavelengths. In contrast, we encountered unresolved spectral ambiguity at blue wavelengths due to the absence of organic absorption in our dataset. Despite this, a surprisingly good sm retrieval regression is achieved (R2 > 0.95 with respect to independent data) using our b*sm(λ). Acquisition of accurate inherent optical properties in future field campaigns is needed to verify the estimated b*sm(λ) and related assumptions. View Full-Text
Keywords: inherent optical properties; mass-specific inherent optical properties; suspended matter; optimization; genetic algorithms; inland waters; radiative transfer equation; Ecolight; spectral optimization inherent optical properties; mass-specific inherent optical properties; suspended matter; optimization; genetic algorithms; inland waters; radiative transfer equation; Ecolight; spectral optimization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Pitarch, J.; Odermatt, D.; Kawka, M.; Wüest, A. Retrieval of Particle Scattering Coefficients and Concentrations by Genetic Algorithms in Stratified Lake Water. Remote Sens. 2014, 6, 9530-9551.

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