Table 1.

Classification of eutrophication levels.

TLI(Ʃ)	[0, 30)	[30, 50]	(50, 60]	(60, 70]	(70, 100)
Grades	I	II	III	IV	V
Trophic state	Oligotrophic	Medium trophic	Light eutrophication	Medium eutrophication	Severe eutrophication