Analysis of water quality characteristics and eutrophication changes in Qingshitan Reservoir from 2015 to 2022
The water quality and eutrophication degree of Qingshitan Reservoir from 2015 to 2022 were evaluated by single factor evaluation method and comprehensive nutritional status index method.Pearson correlation analysis was conducted on the influence factors of nutritional status by use of SPSS 27.The results of analysis demonstrate that in the past 8 years,various indexes of Qingshitan Reservoir showed different change characteristics.The water qual-ity of the reservoirs is generally good classified as class Ⅰ-Ⅲ.The water quality was the best in 2022 and the worst in 2017 with the main pollution factor being total phosphorus.The nutritional status was medium nutritional-poor nutritional.Main factors affecting TLI were potassium permanganate index,chlorophyll-a and transparency.On the whole,the water quality of Qingshitan Reservoir showed an improving trend.
water quality characteristicseutrophicationcomprehensive nutritional status index methodQingshitan Reservoir
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