The Evaluation and Analysis of the City Ecological Index from 2016 to 2021 in Urumqi
The city ecological environment quality of Urumqi are calculated by CEI evaluation system,since 2016-2021,which from the beginning of the 13th five year plan to 14th,and then,measured the correlation degree between the CEI and the 3 indexes or 16 sub indexes with Grey correlation analysis method.This study got some computational conclusions that the CEI of Urumqi are between 64.23 and 68.47 in which the year from 2016 to 2021,the grade is always average;in the past six years,the CEI of Urumqi has been growing slowly but steadily,and it has increased by 4.24 in 2021 which compared with that in 2016,expressing the CEI of Urumqi has improved significantly in these years,that it is a good start for the 14th ecological environment protection work;through the grey correlation analysis,it's confirmed that there has a strong correlation between 3 indexes,16 sub indexes and CEI,the environmental quality index of the three indexes and the air quality compliance rate of the 16 indexes are the key to make it better and better.
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