The water quality and sediment pollution were evaluated by single-factor index method,Nemerow pollution index and comprehensive pollution index.The current situation and causes of water pollution during al-gal bloom in Changxing Lake were studied.The results showed that the mean concentration of total nitrogen(TN)and total phosphorus(TP)in Changxing Lake was 1.49 mg/L and 0.24 mg/L,respectively,and single factor pollution index was 1.49 and 0.24,respectively,which belonging to Class Ⅳ and lower Ⅴ surface water quality.Nemerow pollution index for TN and TP reached 1.59 and 1.58,respectively,both were evaluated as poor.The comprehensive pollution index indicated that the overall water body was at a moderate level of pollu-tion,the main pollutants were nitrogen and phosphorus from the ditches of the industrial park connected with Changxing Lake and Weichuan River.Pearson correlation analysis revealed that nitrogen restricted the growth of algae in Changxing Lake.TN mainly originated from external pollution,and TP was related to the release of phosphorus nutrients from surface sediment in the lake.
关键词
水质/底泥污染/来源分析/蓝藻水华/长兴湖
Key words
Water quality/Sediment pollution/Source analysis/Cyanobacteria bloom/Changxing Lake
维普
万方数据