梁家湾水库水质理化因子及富营养化评价

Assessment of the Physical and Chemical Factors and Eutrophication of Liangjiawan Reservoir

根据梁家湾水库2014.11-2015.10为期一年的水质监测数据,分析该水库中总氮(TN)、总磷(TP)及叶绿素(Chl-a)等水质指标的季节性变化规律,并进行富营养化评价。结果表明:TN质量浓度变化范围为0.169~0.683 mg/L,年平均值为0.405 mg/L,符合《地表水环境质量标准》(GB3838-2002)II类标准,TP质量浓度变化范围为0.002~0.072 mg/L,年平均值为0.029 mg/L,符合《地表水环境质量标准》(GB3838-2002)Ⅲ类标准,TN/TP的年平均值为42.8,水库属于磷(P)限制型。TN、TP和Chl-a浓度随季节变化显著。富营养化评价表明,梁家湾水库为中营养,说明近年来对水库水质保护措施起的作用很大。

Based on the monitoring data of the water quality of Liangjiawan Reservoir from 2014.11 to 2015.10,the variations of TN,TP and chlorophyll-a of the water were analyzed,and an eutrophication assessment was conducted. The results showed that the concentration range of TN was 0.169-0.683 mg/L and the annual average concentration was0.405 mg/L,which met the requirements of the class II standard of Environmental Quality Standard for Surface Water（GB3838-2002）,while the concentration range of TP was 0.002-0.072 mg/L and the annual average concentration was0.029 mg/L,which were up to the class Ⅲ standard of Environmental Quality Standard for Surface Water（GB3838-2002）,and the annual average of TN/TP was 42.8,which showed that the reservoir appeared to be phosphorus-limited.The concentrations of TN,TP and Chl-a had a significant change with the seasons change. The eutrophication assessment showed that the water nutrition of the reservoir was at the middle level,and the measures taken to protect the water quality of the reservoir proved to be effective in recent years.