不同底泥系统的湖泊内源释磷规律研究  

Research on Internal Phosphorus Release of Lakes with Different Sediment System

作　　者：李磊[1] 王慧[1] 张锡辉[1] 马艳军[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084

出　　处：《中国给水排水》2007年第17期76-79,83,共5页China Water & Wastewater

摘　　要：综合运用了现场高频率水质和环境因子检测、底泥磷分级测定、实验室模拟这3种研究手段,对3个底泥生态系统各异(自然湖、存有底泥的人工湖、铺有防渗膜无底泥的人工湖)的典型湖泊进行了底泥磷释放和水体富营养化规律研究。结果表明:除掉底泥而铺设防渗膜无法改善湖泊的富营养化状况;夏季水华暴发会导致湖泊底层处于缺氧状态,最低DO浓度<1mg/L,同时pH值会升高,最高可达9.5,此状态可持续2个月以上;人工湖底泥中Fe-P和Al-P的成分均高于自然湖,在夏季高温、缺氧、碱性pH的典型环境条件下底泥磷的释放量要远大于自然湖,同时其富营养化程度也高于自然湖。The sediment phosphorus release and eutrophication of three kinds of typical lakes with different sediment ecosystems, including natural lake, artificial lake with sediment and artificial lake with impermeable membrane but without sediment, were studied through high frequency water quality and environmental factors monitoring, determination of sediment phosphorus sub-class and lab simulations. The results show that：（1） Removing sediment and laying impermeable membrane cannot change the eutrophic state of the lake; （2） An algae blooming in summer can change the lake bottom into an anaerobic state with DO lower than 1 mg/L, and a rise of pH to 9.5. This situation may last for over two months ; （3） The contents of Fe-P and Al-P in the sediment of the artificial lake are greater than those in the natural lake. In typical summer environment, phosphorus release is also stronger and water eutrophication is more serious.

关 键 词：人工湖 底泥 磷释放 富营养化 

分 类 号：X524[环境科学与工程—环境工程]