Title: Simulation of Hydrodynamics and Solute Transport in the Suwannee River Estuary, Florida
1Simulation of Hydrodynamics and Solute Transport
in the Suwannee River Estuary, Florida
Jerad Bales U.S. Geological Survey Raleigh, NC
2Study Objectives
- Characterize hydrologic and salinity conditions
in Suwannee River Estuary - Develop, calibrate, and document 3-dimensional
unsteady flow and salt transport model. - Provide tool for further applications in Suwannee
River Estuary and offshore.
3Continuous Data Collection in Estuary
4Flows During Data-Collection Period
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6Suwannee River Estuary Net Flows
77/27/00 1040 1133
87/27/00 1835 1954
9Suwannee River Estuary ModelA Salinity
Prediction Tool
- How can the effects of changes in river flow be
separated from all of the other factors affecting
salinity in the Suwannee? - Data--no experiments
- --natural variability is great
- Statistical techniques--many factors
- Computer model--captures most relevant
- natural
processes.
10Computational Grid and Boundaries
Tidal boundary Horseshoe Pt. Tides from Cedar
Key Estimated constant salinity
Upstream boundary AGR Measured flow, zero
salinity
Ocean boundary 20 km Tides from Cedar Key,
Salinity 35 psu Depth 8-9 meters
Tidal boundary Cedar Key Tides from Cedar
Key Estimated constant salinity
11Some Results
12Opportunities and Needs
- Opportunities with existing model
- Evaluate effects of flow changes on salinity
distribution (time and space) in estuary and
offshore. - Simulate movement of neutrally buoyant material
(perhaps larvae?) - Needs
- Increased spatial resolution near shore,
including tidal creeks, marshes, and offshore
reefs. - Ground water inputs.
- Better seaward salinity boundary condition
- Nutrient transport.
13For Additional Information Jerad
Bales U.S. Geological Survey jdbales_at_usgs.gov 919-
571-4048
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15Data Collection
- Streamflow
- Wind
- Water Level
- Salinity
- Velocity
- Bathymetry
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17Calculation of Net Freshwater Flow at East Pass
18Flow distribution on falling tide
19Flow distribution on rising tide
20EFDC--Rationale for Selection
- Scientifically robust.
- Public domain--available to SRWMD.
- Good documentation.
- Supported by EPA.
- Used successfully by SJRWMD and SFWMD.
- Water-quality simulation capabilities.