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Value index (NDVI, GNDVI, BNDVI, NDREI) and phycocyanin concentration correlation.
| June | R2 | August | R2 | September | R2 | |
|---|---|---|---|---|---|---|
| NDVI | y = 0.1604× - 0.8625 | 0.3359 | y = 0.4923x + 1148.3 | 0.7607 | y = 0.532x + 1168.8 | 0.7773 |
| GNDVI | y = 0.0102× - 0.1497 | 0.3071 | y = 0.1152× - 0.8765 | 0.5341 | y = 0.1172× - 3.0528 | 0.2665 |
| BNDVI | y = 0.0276× - 0.415 | 0.5143 | y = 0.0109× - 0.1789 | 0.2965 | y = 0.4453x + 2038.6 | 0.4146 |
| NDREI | y = 0.5224x +1217.2 | 0.7203 | y = 0.0191× - 0.8216 | 0.5734 | y = 0.1299× - 3.2361 | 0.3594 |
