Table 2.

Regression models for Chl-a with three types of spectrum indices.

Model	Optimal Bands	Model	R2	MRE
Single-band	733.1 nm	Chla = −0.0227×R733.1 + 0.0568	0.705	26.3%
First-derivative	446.9nm	Chla = −0.3301R’446.9 + 0.023	0.863	11.2%
Reflectance Ratio	R861.1/R865.7	Chla = 0.2293 × (R861.1 / R865.7) − 0.2146	0.861	13.8%