环境保护科学2011，Vol.37Issue(2)：7-9,13,4.
湖流作用下太湖底泥再悬浮和NH4-N释放规律研究
Study on Resuspension and NH4-N Release of Taihu Lake Sediment under Current Flow
摘要
Abstract
The resuspension principle of Taihu Lake sediments was simulated in a rectangular tank. The effect of flow velocity on Taihu Lake sediment resuspension and NH4-N release was analyzed. The results show that the sediment does not happen a lot sus pension, water turbidity and NH4-N concentrations change little on the condition of the velocity less than 20 cm/s; the mass of sediment suspends, as well as water turbidity and NH4-N concentration significantly increase when the velocity is more than 40 cm/s.Through the start criterion for a small amount sediment movement in Taihu Lake, the sediment resuspension occurs in the critical velocity of 20 em/s ,corresponding to the critical shear stress of 0.034 N/m2 in this study.关键词
太湖底泥/再悬浮/起动流速/临界切应力/浊度Key words
Taihu Lake Sediment/Resuspension/Starting Velocity/Critical Shear Stress/Turbidity引用本文复制引用
王忖,王超..湖流作用下太湖底泥再悬浮和NH4-N释放规律研究[J].环境保护科学,2011,37(2):7-9,13,4.基金项目
国家重点基础研究发展计划(973)项目(2008CB418203)资助 （973）
浅水湖泊综合治理与资源开发教育部重点实验室(2084/409290)资助 （2084/409290）
