摘要
根据2007年至2011年对鄱阳湖表层水体的监测数据,对鄱阳湖进行了溶解氧的现状分析以及年内变化趋势分析,同时也对溶解氧及其相关因素进行了较详细的分析。结果表明:鄱阳湖溶解氧含量介于5.2mg/L与11.91mg/L之间,按照DO的水质标准,鄱阳湖主要为Ⅰ,Ⅱ类水,少部分地区水质在Ⅲ类水或Ⅲ类以下。鄱阳湖区溶解氧在时间上基本上是按丰水期、平水期、枯水期逐渐增加,其中枯水期溶解氧含量相对偏高。进一步进行相关性分析,溶解氧与水温呈显著的相关,与pH值有协同作用;溶解氧与总氮总磷呈负相关,其中与总磷的相关性更显著,与硝氮呈正相关,与氨氮呈显著负相关;营养盐的增加会削弱水温对溶解氧的作用,大水面作用是鄱阳湖溶解氧的主要来源。
Based on the monitoring data of surface water samples of Poyang Lake from 2007 to 2011, the status of dissolved oxygen （DO） and annual variation trend of DO were analyzed, together with DO and its related factors. The results indicate that in the turn from wet season to normal-water period to dry season, DO concentration is increasing in Poyang Lake. For further study, the correlation analysis between DO concentration and its influencing factors was made. According to the results of correlation analysis, there are significant positive correlations between DO concentration and water temperature as well as synergistic action with PH; the rela-tionship between DO concentration and the concentrations of total nitrogen and phosphorus displays negative correlations, of which more significant with total phosphorus. Besides, there is positive correlation between DO concentration and nitrate nitrogen, but significant negative correlation with ammonia nitrogen. The correlation between DO concentration and water temperature will be impaired by the increase in nutrients. Besides, the large surface dissolving is the main source of DO in Poyang Lake.
出处
《中国农村水利水电》
北大核心
2013年第10期122-125,共4页
China Rural Water and Hydropower
基金
国家公益性水利行业专项(201001054)
赣科技支撑项目(2009BSA13800)
关键词
溶解氧
相关性
鄱阳湖
环境因素
dissolved oxygen
relevance
Poyang Lake
environmental factors
