Velocity_GBI: Modeling the effects of large-scale interior headland restoration on tidal hydrodynamics and salinity transport in an open coast, marine-dominant estuary: model input and results
Using version 20.1_19 of the Discontinuous-Galerkin Shallow Water Equations Model (DG-SWEM) (Kubatko and others, 2006), astronomic tides and salinity transport were simulated at Grand Bay, Alabama (AL), under scenarios of interior headland restoration and sea level rise, as described in Passeri and others (2023). The two-dimensional DG-SWEM model can be applied to coastal and estuarine systems to solve for time-dependent hydrodynamic circulation and salinity transport. The DG-SWEM model uses the ADCIRC framework (Luettich and others, 1992) and requires inputs of an unstructured finite element mesh. For this study, the mesh domain has an open ocean boundary in the Gulf of Mexico and has higher spatial resolution elements (20 - 100 meters [m]) along the Mississippi and Alabama coast. The model mesh coordinates (latitude and longitude) and simulated maximum velocities are included in this data release. For further information regarding model input generation and visualization of model output, refer to Passeri and others (2023).
Passeri, Davina L., and Jenkins, Robert L. III, 2023001, Velocity_GBI: Modeling the effects of large-scale interior headland restoration on tidal hydrodynamics and salinity transport in an open coast, marine-dominant estuary: model input and results:.
This is part of the following larger work.
Passeri, Davina L., and Jenkins, Robert L. III, 20230601, Modeling the Effects of Large-scale Interior Headland Restoration on Tidal Hydrodynamics and Salinity Transport in an Open Coast, Marine-dominant Estuary: Model Input and Results: U.S. Geological Survey data release doi:10.5066/P9OO9N0O, U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL.
This is a Raster data set.
It contains the following raster data types:
Dimensions 490085 x 1 x 1, type Grid Cell
What coordinate system is used to represent geographic features?
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude.
Latitudes are given to the nearest 0.0197905613.
Longitudes are given to the nearest 0.0226048392.
Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.0.
The flattening of the ellipsoid used is 1/298.25722210100002.
Altitude_Datum_Name:North American Vertical Datum of 1988 Altitude_Resolution:0.01 Altitude_Distance_Units:meter Altitude_Encoding_Method:Attribute values
The Climate and Forecast (CF)-compliant metadata (version CF-1.6) in the header of the NetCDF file provides spatial information for projecting the data into a geographic information system (GIS). It also provides information about the conventions used for attributes in the dataset.
The entity and attribute information were generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information.
These data were generated to examine the effects of interior headland restoration on astronomic tides and salinity transport in Grand Bay, AL. Velocity_GBI.zip is a dataset consisting of Federal Geographic Data Committee (FGDC) metadata and a Network Common Data Form (NetCDF) file containing the following variables: coordinates of the model mesh (longitude and latitude) and the maximum velocity reached during the duration of the astronomic tide simulation, in meters/second, for the Grand Batture Island (GBI) restoration scenario.
Kubatko, E.J., Westerink, J.J., and Dawson, C., 20061201, hp Discontinuous Galerkin methods for advection dominated problems in shallow water flow: Computer Methods in Applied Mechanics and Egnineering Volume 196, Issues 1-3, pg. 437-451.
Type_of_Source_Media:Online digital data Source_Contribution:
Two-dimensional model code used to solve for time-dependent hydrodynamic circulation and salinity transport.
tide inputs (source 2 of 2)
Passeri, D.L., Jenkins III, R.L., Poisson, A., Bilskie, M.V., and Bacopoulos, P., 20230531, Modeling the effects of large-scale interior headland restoration on tidal hydrodynamics and salinity transport in an open coast, marine-dominant estuary: Frontiers in Marine Science Unknown.
Type_of_Source_Media:Online digital data Source_Contribution:
Initial model unstructured finite element mesh, inputs and boundary conditions.
DG-SWEM with tide inputs was used to simulate astronomic tides in the Grand Bay, AL region. Model setup and boundary conditions are outlined in Passeri and others (2023). This dataset provides the maximum velocities for the Grand Batture Island scenario. Values of -99999 indicate no data. The maximum velocities were then packaged into a NetCDF file (.nc) using the functions available in Mathworks MATLAB (R2017a) for inclusion in this data release.
Person who carried out this activity:
Luettich, Jr., R.A., Westerink, J.J., and Scheffner, N.W., 19921101, ADCIRC: An advanced three-dimensional circulation model for shelves, coasts and estuaries, Report I: Theory and methodology of ADCIRC-2DDI and ADCIRC-3DL: U.S. Army Corps of Engineers, Washington, DC.
How accurate are the geographic locations?
This dataset contains the model geospatial information and maximum velocities for the Grand Batture Island scenario. Within the ADCIRC model, the coordinates are provided in decimal degrees using the North American Datum of 1983 (NAD83) geographic coordinate system; maximum velocities are provided in meters/second.
Where are the gaps in the data? What is missing?
These are the complete maximum velocities for the Grand Batture Island scenario. This dataset is considered complete for the information presented, as described in the abstract section. Users are advised to read the rest of the metadata record carefully for additional details.
This digital publication was prepared by an agency of the United States Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Velocity_GBI.nc is a NetCDF file that contains the coordinates of the model mesh (longitude and latitude, in decimal degrees) and simulated maximum velocities (in meters/second) for the Grand Batture Island scenario.
in format NetCDF