abstract:The trophic level index is used in New Zealand as a measure of nutrient status of lakes.New Zealand Ministry for the Environment - Trophic Level Index for lakes It is similar to the trophic state index but was proposed as alternative that suited New Zealand.
According to the comprehensivetrophiclevel index (TLI), the values of Tangxireservoir were between30 and 50. It showed that the reservoir was mesotrophic.