Fuzzy Comprehensive Evaluation of Seawater Quality in Zhifu Bay from 2014 to 2020
Based on the water quality monitoring results of Zhifu Bay from 2014 to 2020,the changes in dissolved oxygen,chemical oxygen consumption,inorganic nitrogen,and active phosphate content in seawater were analyzed year by year.And based on the national seawater quality standards,the fuzzy comprehensive e-valuation method was used to analyze the water quality situation of Zhifu Bay in various years.The water qual-ity evaluation results indicate that the annual fluctuations in dissolved oxygen and chemical oxygen consump-tion are significant,while the content of inorganic nitrogen and active phosphate decreases year by year.Prior to 2016,the water quality improvement in Zhifu Bay was poor.In 2014,the water quality was classified as Class Ⅳ water,while it remained classified as Class Ⅰ water from 2018 to 2020,with inorganic nitrogen as the main pollutant.The overall water quality level has been increasing year by year,indicating that the water qual-ity is gradually improving.
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