Meeting:Abstract 2011 CSDMS meeting-081: Difference between revisions
m (WikiSysop moved page Temp:Abstract 2011 CSDMS meeting-081 to Meeting:Abstract 2011 CSDMS meeting-081 without leaving a redirect) |
m (Text replacement - "USA" to "United States") |
||
| Line 5: | Line 5: | ||
|CSDMS meeting city=Gloucester Point | |CSDMS meeting city=Gloucester Point | ||
|CSDMS meeting state=Virginia | |CSDMS meeting state=Virginia | ||
|CSDMS meeting country= | |CSDMS meeting country=United States | ||
|CSDMS meeting email address=ckharris@vims.edu | |CSDMS meeting email address=ckharris@vims.edu | ||
|CSDMS meeting phone=804 684 7194 | |CSDMS meeting phone=804 684 7194 | ||
| Line 21: | Line 21: | ||
|CSDMS meeting coauthor town-city=Seattle | |CSDMS meeting coauthor town-city=Seattle | ||
|State=Washington | |State=Washington | ||
|CSDMS meeting coauthor country= | |CSDMS meeting coauthor country=United States | ||
}} | }} | ||
{{CSDMS meeting authors template | {{CSDMS meeting authors template | ||
| Line 29: | Line 29: | ||
|CSDMS meeting coauthor town-city=Woods Hole | |CSDMS meeting coauthor town-city=Woods Hole | ||
|State=Massachusetts | |State=Massachusetts | ||
|CSDMS meeting coauthor country= | |CSDMS meeting coauthor country=United States | ||
}} | }} | ||
{{CSDMS meeting abstract template | {{CSDMS meeting abstract template | ||
Latest revision as of 15:10, 10 June 2017
Browse abstracts
Using a three-dimensional coupled sediment – hydrodynamic model to explore feedbacks between erodibility and sediment trapping in a partially mixed estuary, York River, VA.
[[Image:|300px|right|link=File:]]The MUltiDisciplinary Benthic Exchange Dynamics (MUDBED) program explored the impact of physical and biological processes on turbidity and sediment properties in a muddy estuary. Hydrodynamics, settling velocity, and erodibility influence suspended sediment concentrations. In turn, flux convergence and divergence modify suspended sediment and seabed properties, thereby impacting Estuarine Turbidity Maxima (ETM). In partially mixed estuaries like the York River, VA variations in stratification and sediment trapping respond to tides, discharge, and winds, and produce a Secondary Turbidity Maxima (STM) that appears seasonally downstream of the main ETM.
A hydrodynamic and sediment-transport model of the York River was developed to examine feedbacks between sediment flux convergence, erodibility, and settling velocity. The Regional Ocean Modeling System (ROMS) was coupled to the Community Sediment Transport Modeling System (CSTMS). The model included bed consolidation by representing critical shear stress for erosion as increasing with depth in the bed and with time since deposition. Multiple grain types were used having settling velocities from 0.1 – 2.5 mm/s. Calculations of turbidity and erodibility showed similar patterns to observations and exhibited high spatial variability in both the along and across channel directions. Sediment trapping in the model led to the development of an erodible pool of sediment near the observed STM. Enhanced erodibility elevated suspended sediment concentrations in that area for some time after sediment convergence processes diminished. This poster will explore the behavior of the model and evaluate the use of the simplified bed consolidation model within a full three-dimensional numerical model.
