摘要
通过在太湖开展的风浪与底泥悬浮的野外观测,结合分层采取水样并分析水体中溶解性营养盐的浓度随深度的变化结果,发现在水土界面的上覆水中营养盐浓度有突然增加的现象,指示着沉积物对上覆水营养盐浓度有影响.对沉积物中孔隙水营养盐浓度随深度的变化分析,表明了沉积物孔隙水中营养盐浓度变化与氧化还原环境的关系.结合水动力作用,提出了大型浅水湖泊水动力作用导致底泥悬浮,从而使得底泥中的可溶性营养物质释放这一内源释放的概念性模式.
Based on the field investigation of the wave and sediment suspension in Taihu Lake, along with sampling water by layer and analyzing the nutrient concentration change with depth, it was found that the nutrient concentration enhanced suddenly on the bottom. layer indicating the influence of sediment. Analysis of change of the nutrient concentration in porewater with depth indicates the relation between the oxidative-reductive conditions and the nutrient concentration. Integrating with dynamic function, the hydrodynamic inclucement of sediment suspension and a conceptual model for nutrient release from sediment in large shallow lake were suggested.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2002年第2期150-153,共4页
China Environmental Science
基金
国家自然科学基金资助项目(40071019)
中国科学院知识创新资助项目(KZCX2-311)
关键词
太湖
水动力
底泥
孔隙水
悬浮释放
Taihu Lake
hydrodynamic
sediments
porewater
suspension and release
