Spatial Differentiation Analysis of Water Quality in Dianchi Lake Based on GF-5 NDVI Characteristic Optimization

Table 2

Characteristic bands of Caohai and Waihai in the red band.

Area	Band	Reflectance value (%)	Band characteristics
Caohai	B74 (703 nm)	1.34	Reflection peak, max
	B66 (669 nm)	0.64	Absorption valley
	B86 (754 nm)	0.63	Min
		0.95	Mean
Waihai	B74 (703 nm)	2.76	Reflection peak, max
	B66 (669 nm)	1.59	Absorption valley
	B86 (754 nm)	0.92	Min
		1.86	Mean