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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Laboratory studies on the response of fine sediment to wind
Laboratory studies on the response of fine sediment to wind
Author : M. SU (1) (2), P. YAO(1) (2), Z.B. WANG (3), Y.P. CHEN (2), C.K. ZHANG (2), & M.J.F. STIVE (1)
ABSTRACT
To investigate the effects of wind on the suspension of fine sediment, we perform a series of laboratory experiments on a
type of in-situ sediments, which was collected from a silty tidal flat of the Jiangsu coast in China. For testing the combined
effects of wave and wind, paddle waves are generated with wind blowing on the water surface. Quasi-steady suspensions
were obtained under a wide range of wind conditions. Analyses of the suspended sediment concentration reveal that the
wind indeed influences the motion of fine sediment, especially under a stronger wind condition. Furthermore, detailed
analyses of the velocity in terms of a phase-averaged velocity and turbulence reveal that the response of this sediment to
the wind is mainly through suspended load. Turbulence momentum induced by the wind can transport vertically and lead to
a longer time sediment suspension. The influence depth depends on the ratio between the wind-induced turbulence and
the accompanied attenuation.
File Size : 1,668,133 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 18/08/2015
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