人工湖泊滴水湖水质演变趋势及富营养化分析

人工湖泊滴水湖水质演变趋势及富营养化分析

田华;刘水芹;方伟;边佳胤;李娟英

【期刊名称】《水利渔业》 【年(卷),期】2011(032)006

【摘要】Main water quality indicators of Dishui Lake in Shanghai were monitored for six consecutive years. The results showed that the salinity of the lake decreased from 3 to 1 since the impound in 2004; the N/P also showed a declining trend year by year and phosphorus was the limiting nutrient element in Dishui Lake; the water quality in the lake remained at the level of Ⅳ to Ⅴ class of surface water; the major pollutants affecting water quality were CODMn, TP, TN and BOD. The analysis of monitoring data indicated that the variation trend of eutrophication was generally consistent with that of chlorophyll a content in the lake, and TP was the main indicators impacting the chlorophyll a content and the eutrophication of the lake. In addition, eutrophication index was prone to rising in summer and autumn.%对上海临港新城滴水湖自建成以来的水质指标进行为期6年的监测。结果表明,湖区自2004年蓄水以来,水体盐度已由3逐渐下降到2010年的1左右;N/P也呈现逐年下降的趋势,其中磷是滴水湖的营养限制元素;湖区总体水质基本维持在地表水Ⅳ～Ⅴ类,影响水质的主要污染物为CODMn、TP、TN和BOD。对湖区富营养化分析的结果表明,其富营养化程度变化趋势与水体中叶绿素a含量的变化基本一致,TP是影响其叶绿素a含量和水体富营养化程度的主要指标,且在夏秋季