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Simulate and assess tide-dependent estuarine floc mass distributions driven by multiclass aggregation, disaggregation, and bed sediment exchange.

March 20, 2025Journal of Marine Science and EngineeringOpen Access

Estuarine Floc Mass Distributions from Aggregation/Disaggregation and Bed Sediment Exchange

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Authors

WMWilliam H. McAnallyIntegrated Dynamic Electron Solutions (United States)AMAshish J. MehtaEmory University AMAndrew J. ManningHR Wallingford

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Implication

Numerical modeling study shows that suspended floc dynamics govern particle mass distributions across tidal cycles, indicating water-column processes outweigh bed sediment exchange.

Key Points

Simulate and assess tide-dependent estuarine floc mass distributions driven by multiclass aggregation, disaggregation, and bed sediment exchange.
Gathered 1998 tidal time-series data of water elevation, current velocity, salinity, and suspended sediment concentration near the turbidity maximum in the Tamar Estuary.
Determined in situ floc mass distributions from measurements of suspended sediment concentration, floc diameters, and settling velocities on June 24 and August 5.
Implemented a revised time-dependent multiclass model incorporating floc aggregation, disaggregation, erosion, and deposition across ebb and flood tidal cycles.
Model predictions of median floc diameter achieved close agreement with in situ observations across ebb and flood tidal cycles on both evaluated days.
Water-column aggregation and disaggregation dynamics served as the primary drivers of floc size distributions, whereas bed sediment exchange contributed only secondarily.

Cite This Study

McAnally et al. (2025) studied this question.

synapsesocial.com/papers/6aa4cba268dd06f3d4aa2389 https://doi.org/10.3390/jmse13030615

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Implication

Numerical modeling study shows that suspended floc dynamics govern particle mass distributions across tidal cycles, indicating water-column processes outweigh bed sediment exchange.

Estuarine Floc Mass Distributions from Aggregation/Disaggregation and Bed Sediment Exchange

Discussion

Member takes

Implication

Key Points

Cite This Study

Estuarine Floc Mass Distributions from Aggregation/Disaggregation and Bed Sediment Exchange

Discussion

Member takes

Implication

Key Points

Cite This Study

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