A Field and Modeling Study of Fine Sediment Transport in Shallow Waters

by Y. P. Sheng, Univ of Florida, United States,
V. Cook, Univ of Florida, United States,
S. Peene, Univ of Florida, United States,
D. Eliason, Univ of Florida, United States,
S. Scofield, Univ of Florida, United States,
K. -M. Ahn, Univ of Florida, United States,
P. F. Wang, Univ of Florida, United States,

Document Type: Proceeding Paper

Part of: Estuarine and Coastal Modeling

Abstract: As part of a major effort to understand and quantify the phosphorus dynamics in Lake Okeechobee, the transport of fine sediments has been studied by combining numerical modeling with an extensive field program. The results indicate that wave-induced bottom stress is the primary cause of erosion and resuspension of fine sediments from the muddy bottom over the eastern portion of the lake. Due to the relatively low vertical shear associated with the wind-driven currents, suspended sediments get mixed into the upper water column very slowly. Using a one-dimensional model of vertical mixing of sediments, we were able to reproduce the measured diurnal variation in suspended sediment concentration. A three-dimensional model of fine sediment transport has been developed and some results are presented.

Subject Headings: Hydrologic models | Sediment transport | Model analysis | Field tests | Shallow water | Lakes | Suspended sediment | Mathematical models | Three-dimensional models | Numerical models | North America | Florida | United States

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