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Sediment-associated constituent rele...

Li, Yigong.

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Sediment-associated constituent release at the mud-water interface due to monochromatic waves.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Sediment-associated constituent release at the mud-water interface due to monochromatic waves./
作者:	Li, Yigong.
面頁冊數:	315 p.
附註:	Source: Dissertation Abstracts International, Volume: 57-09, Section: B, page: 5548.
Contained By:	Dissertation Abstracts International57-09B.
標題:	Hydrology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9703568
ISBN:	0591100231

Sediment-associated constituent release at the mud-water interface due to monochromatic waves.
Li, Yigong.

Sediment-associated constituent release at the mud-water interface due to monochromatic waves. - 315 p.

Source: Dissertation Abstracts International, Volume: 57-09, Section: B, page: 5548.

Thesis (Ph.D.)--University of Florida, 1996.

Constituent release fluxes across the wave-modulated fluid mud-water interface from bottom sediment into water have been determined through a combination of theoretical analyses and laboratory experiments.

ISBN: 0591100231Subjects--Topical Terms:

545716
Hydrology.

Sediment-associated constituent release at the mud-water interface due to monochromatic waves.
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100 1 $a Li, Yigong. $3 1903371
245 1 0 $a Sediment-associated constituent release at the mud-water interface due to monochromatic waves.
300 $a 315 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-09, Section: B, page: 5548.
500 $a Chairperson: Ashish J. Mehta.
502 $a Thesis (Ph.D.)--University of Florida, 1996.
520 $a Constituent release fluxes across the wave-modulated fluid mud-water interface from bottom sediment into water have been determined through a combination of theoretical analyses and laboratory experiments.
520 $a The dependence of the equilibrium fluid mud depth on characteristic wave and bed rheological parameters is examined for water-bed and water-fluid mud-bed systems. Theoretical results are compared with data obtained in a wave flume, and an order of magnitude agreement between measured and predicted fluid mud thicknesses is achieved. A three-layered, water-fluid mud-bed system is set up for modeling vertical fine-grained sediment transport. Model results are shown to be in good agreement with laboratory data, and are also shown to successfully simulate field measurements from two coastal sites.
520 $a A vertical constituent transport model, which includes sorption kinetics, is developed and is combined with the sediment transport model. The total constituent release flux from mud under wave action comprises mainly three sub-fluxes including direct convective flux of the dissolved constituent, indirect convective flux of dissolved constituent and indirect particle-bound constituent flux. The behavior of the mass transfer coefficient of the direct convective flux is examined through dimensional analysis, and a Chilton-Colburn type relation is obtained for determining this coefficient as a function of measurable parameters.
520 $a Two clayey sediments are used to prepare bottom mud, and two conservative dyes are used as constituent surrogates. By calibrating the constituent transport model against wave flume data obtained for the rate of release of dyes from bottom mud, release sub-fluxes under wave loading are calculated. The indirect convective sub-flux is found to be an order of magnitude lower than the directive convective and particle-bound sub-fluxes. However, the direct convective sub-flux can be amplified several times due to interfacial oscillation, and the interfacial flux coefficient is found to be related to the Richardson Number. Particle-bound sub-flux can dominate the constituent release process when significant resuspension occurs. However, resettling of the sediment flocs and entrapped water tends to considerably reduce the net release of constituent to the ambient water column. Finally, wave-induced diffusivity in mud, which controls the rate of upward supply of the constituent to the interfacial region, is found to be proportional to wave energy dissipation rate per unit volume of mud, and is shown to be two or three orders of magnitude greater than molecular diffusion.
590 $a School code: 0070.
650 4 $a Hydrology. $3 545716
650 4 $a Engineering, Environmental. $3 783782
690 $a 0388
690 $a 0775
710 2 0 $a University of Florida. $3 718949
773 0 $t Dissertation Abstracts International $g 57-09B.
790 1 0 $a Mehta, Ashish J., $e advisor
790 $a 0070
791 $a Ph.D.
792 $a 1996
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9703568