Quantifying uncertainties inherent to the water quality monitoring datasets (satellite or in situ) is crucial in determining how accurate the designed water quality products are, and in identifying the best data sets and information sources for specific regions or seasons of the GBR. This is particularly relevant for the retrieval of Level-2 RS data in the complex coastal Case II waters of the GBR. Improvements in deriving data from Case II waters is ongoing, both at a GBR and an international scale, and requires extensive validation across coastal water types, particularly in wet season conditions where high concentrations of suspended sediment and CDOM co-occur with phytoplankton in river plume waters. To define and map wet season conditions, particularly through periods of high river flow, “alternative” RS methods based on the extraction and analysis of MODIS true colour data have been tested and are described more fully in the following section.
2.3.4. Wet