For all indicators, water quality classes were completely consistent with each other at 7 sites
(Table 3).
Other sites also showed good consistency between two indicators except for site 12. By
locating the 16 sites on the classified image, we found the spectral classes at 4 sites were consistent with
the results from other three indicators, and 5 sites were consistent with two indicators, while other sites
did not show a good consistency. Even though, it indicated that the spectral classification could generally
identify different water quality.