摘要
本文根据潮滩悬沙粒度、含沙量和水动力资料以及细颗粒泥沙动水絮凝试验资料,分析了潮滩不同粒级悬沙的动力沉积特性。文章认为,粒径大于32μm的粗颗粒以单颗粒重力沉积为特征,大部分在涨急前落淤;粒径在4～32μm的中细粉砂,在适宜的动力条件下(流速小于28cm/s大于18cm/s)发生动水絮凝沉积,其它时间发生单颗粒沉积;粒径小于4. 0μm的粘性细颗粒在流速小于21cm/s时发生动力絮凝沉积,流速大于21cm/s时,几乎不发生任何沉积。
The dynamical sedimentation characteristics of different grain -size suspended sediments are analysed on the basis of measured velocity , suspended sediment concentration, suspended sediment grain-size distribution and fine sediment flocculation test in flowing saline water. It is suggested that 32μm coarse suspended sediments settle in single grain by gravity and deposit for the most part before the maximum flood velocity occurs; 4- 32μm mediun - fine silts dedposit in floc when tidal current speed is between 18-28cm/s but in single grain for the rest time ;Cμm clay settle in floc when tidal current speed is less than 21cm/s and hardly settle when the speed is greater than 21cm/s.
出处
《海洋通报》
CAS
CSCD
北大核心
1993年第5期51-55,共5页
Marine Science Bulletin
关键词
潮滩
悬沙
动力沉积
台州湾
tidal flat
suspended sediments
dynamical sedimentation
Taizhou Bay
Zhe-jiang
