Separability (S) score between pure water MODIS pixels and other LCs (soil and vegetation) for the different NDSIs and combined index at all test sites.

SAVG refers to the average separability value of each index for water with respect to all the other classes at the four sites. Rank refers to the relative position (1 = best and 12 = worst) of each index separability with respect to the others and RankAVG the mean value.