文山市暮底河水库水质特征污染物及变化趋势分析

Analysis of the Water Quality Characteristics and Change Trend of Mudi River Reservoir in Wenshan City

通过对暮底河水库2008—2022年水质监测数据进行统计分析,并根据污染指数和污染分担率计算,结果表明总氮为暮底河水库的特征污染物。采用污染变化趋势的定量分析方法——秩相关系数法评价,暮底河水库不包括总氮的水质综合类别呈上升趋势,水质明显好转,但单独评价指标总氮变化呈加重趋势。应根据总氮的主要来源有针对性的采取措施,防止总氮污染的进一步恶化。

Through the statistical analysis of the water quality monitoring data of Mudi River reservoir from 2008 to 2022,the pollution index and pollution sharing rate were calculated.The results showed that the total nitrogen was the characteristic pollutant of Mudi River reservoir.Spearman method was used as the quantitative analysis method to analyze the pollution change trend.The comprehensive category of water quality excluding total nitrogen in Mudi River reservoir showed an upward trend,and the water quality improved significantly,but the total nitrogen change in the individual evaluation index showed an aggravating trend.Countermeasures should be taken according to the main sources of total nitrogen to prevent further deterioration of total nitrogen pollution.