کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1727402 | 1520786 | 2006 | 14 صفحه PDF | دانلود رایگان |
The in situ distribution by weight of the suspended sediment is studied in terms of settling velocity. The available published data concerning this distribution in three high-energy regions (San Francisco Bay, Thames estuary and Loire estuary) is in good accordance with a gamma distributed settling velocity. The vertical dynamics of the suspended aggregates in a flow is examined under steady state conditions. As a consequence of this dynamics, if the settling velocity of the suspended sediment mass at the bottom is gamma distributed, then, settling velocity is gamma distributed at every level z in the water column. In this case the vertical variation of the local mean settling velocity W¯ is proportional to a power 1/r of the local concentration C, where r is the gamma distribution shape parameter.
Journal: Ocean Engineering - Volume 33, Issues 5–6, April 2006, Pages 665–678