湖泊沉积物再悬浮研究进展

Review of Lake Sediment Resuspension

湖泊沉积物在受到外力干扰时会发生再悬浮,这一现象在浅水湖泊中尤为普遍。当外力扰动产生的作用力大于沉积物起动的临界切应力时,再悬浮现象就会发生。引起沉积物再悬浮的驱动力主要有风浪扰动、生物扰动、清淤、航运捕捞。目前,国内外对沉积物再悬浮的研究主要通过现场观测研究、室内模拟研究和数值模拟研究来展开的,并且已经取得了一定研究成果。

Lake sediments will resuspend when disturbed by external forces.This phenomenon is particularly common in shallow lakes.Resuspension occurs when the external force produces more effects than the critical bottom shear stress of sediment suspension.The driving forces of sediment resuspension mainly include:wind disturbance,biological perturbation,dredging,shipping and fishing.At present,the researches of sediment resuspension at home and abroad are mainly conducted through field observation research,indoor simulation research and numerical simulation research,and certain research findings have been achieved.