The role of turbulence & particle aggregation in salt mash accretion. (Withdrawn).Measurements of flow, turbulence and suspended sediment concentration were carried out in a tidal creek that feeds an intertidal in·ter·tid·aladj. Of or being the region between the high tide mark and the low tide mark. in salt marsh basin. A laser system (LISST) was used to measure particle size variability in the population of sediment in suspension. Results suggest that flocculation flocculation /floc·cu·la·tion/ (flok?u-la´shun) a colloid phenomenon in which the disperse phase separates in discrete, usually visible, particles rather than congealing into a continuous mass, as in coagulation. is an important parameter controlling advection ad·vec·tion n. 1. The transfer of a property of the atmosphere, such as heat, cold, or humidity, by the horizontal movement of an air mass: , which in turn influences sediment transport and marsh accumulation. High turbulence levels related with spring tides break floes enhancing sediment advection, while during neap tides the lowest tides of the lunar month, which occur in the second and fourth quarters of the moon; - opposed to See also: Neap turbulence levels are lower and contribute to the formation of flocs with higher settling velocities. A simplified model of sediment transport due to tidal forcing alone was used to examine sediment transport during spring and neap conditions. The results indicate that salt marsh sediment import occurs primarily during spring tides. George Voulgaris Department of Geological Sciences University of South Carolina |
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