among the 34 lakes studied in 1970's, most of lakes were in the mesotrophic status, mesotrophic water area accounted for 91.8%.
此中34个湖泊1970年的研讨,年夜局部湖泊都在中养状况,营养型水域面积占91.8%。
results show that mesotrophic water constitutes 42.6% of total water area, and the area of eutrophication is 5.8%, including miaohu lake and shuiguohu lake.