昆明翠湖水质变化特征及影响因素研究

STUDY ON THE VARING CHARACTERISTICS AND INFLUENCING FACTORS OF WATER QUALITY OF CUIHU LAKE IN KUNMING

翠湖是昆明非常重要的景观水体。通过对翠湖有代表性位点水样及相应底泥样品的采集,翠湖水样及底泥的主要指标进行监测、分析和评价。结果表明:目前翠湖水体(总磷含量0.38mg/L,总氮5.06mg/L,氨氮2.37mg/L)已属富营养化水体;翠湖水体总磷、总氮和氨氮含量随季节呈现明显动态变化,高锰酸盐指数和pH值等含量随季节变化不明显;底泥总磷含量3.02g/kg,速效磷163.29mg/kg,碱解氮493.41mg/kg,水体营养盐和底泥营养盐含量有明显相关性,底泥中营养盐总磷、速效磷和碱解氮含量对水体富营养程度有很大影响。

Cuihu Lake is one of the most important scenery water in Kunming City. Today people pay more attention to the water quality of Cuihu Lake. Eight representive sites were located and water samples and relevant sediment samples in the Cuihu Lake were collected.And the main indexes were monitored ,analyed with the correlation and evalated.The result showed that the content of the TP, TN and NH3-N of water were respectively 0.38mg/L, 5.06 mg/L and 2.37 mg/L in Cuihu Lake that had been eutrophieated.The content of the TP, TN and NH3-N of water varied with different season, but CODMn, pH kept a little variation.The content of the TP, Olsen-P and available N of sediment in the Cuihu Lake were respectively 3.02 g/kg, 163.29 mg/kg and 493.41 mg/kg. The content of nutrient eoneentretions in the water was correlated with the content of them in the sediment in the Cuihu Lake. The TP, Olsen-P and available N contributed to the eutrophieated water of Cuihu Lake.