Hydrodynamic and Sediment Transport Model Application for OSAT3 Guidance: peak wave period

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Dalyander, P. Soupy, Long, Joseph W., Plant, Nathaniel G., and Thompson, David M., 2012, Hydrodynamic and Sediment Transport Model Application for OSAT3 Guidance: peak wave period: U.S. Geological Survey Open-File Report 2012-1234, U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL.

   Online Links:

   • https://pubs.usgs.gov/of/2012/1234/datafiles.html

   This is part of the following larger work.
   Plant, Nathaniel G., Long, Joseph W., Dalyander, P.Soupy, and Thompson, David M., 2012, Hydrodynamic and Sediment Transport Model Application for OSAT3 Guidance: U.S. Geological Survey Open-File Report 2012-1234, U.S. Geological Survey, Coastal and Marine Geology Program, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL.

   Online Links:

   • https://pubs.usgs.gov/of/2012/1234/

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -88.720441
   East_Bounding_Coordinate: -85.410772
   North_Bounding_Coordinate: 30.696090
   South_Bounding_Coordinate: 29.395074
   

3. What does it look like?

   model_bathymetry.jpg (JPEG)

   Graphic showing the numerical model domain over which analysis is conducted.

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 01-Apr-2010

   Ending_Date: 01-Aug-2012

   Currentness_Reference:

   ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: vector digital data
   

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?
      

      Indirect_Spatial_Reference: Gulf of Mexico
      

      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (683660)
   2. 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 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.
      

      Vertical_Coordinate_System_Definition:

      Altitude_System_Definition:

      Altitude_Datum_Name: North American Vertical Datum of 1988
      Altitude_Resolution: 0.01 m
      Altitude_Distance_Units: meters
      Altitude_Encoding_Method:

      Explicit elevation coordinate included with horizontal coordinates

7. How does the data set describe geographic features?

   Hh_Dd_wave_period

   Peak wave period for specific wave scenarios (Source: USGS)

   FID

   Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI) Coordinates defining the features.

   Scenario_H

   Scenario wave height number (e.g., "h" in Hh_Dd, see wave_scenarios.txt) (Source: USGS)

   Range of values
   Minimum:	1
   Maximum:	5
   Units:	non-dimensional
   Resolution:	1

   Scenario_D

   Scenario wave direction number (e.g., "d" in Hh_Dd, see wave_scenarios.txt) (Source: USGS)

   Range of values
   Minimum:	1
   Maximum:	16
   Units:	non-dimensional
   Resolution:	1

   PeakWavePeriod

   peak wave period (Source: USGS)

   Range of values
   Minimum:	0
   Maximum:	30
   Units:	s
   Resolution:	0.01

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • P. Soupy Dalyander
   • Joseph W. Long
   • Nathaniel G. Plant
   • David M. Thompson
2. Who also contributed to the data set?
3. To whom should users address questions about the data?
   P. Soupy Dalyander

   U.S. Geological Survey

   Oceanographer

   600 4th Street S

   St Petersburg, FL
   

   USA

   (727) 502-8124 (voice)

   (727) 502-8001 (FAX)

   sdalyander@usgs.gov

Why was the data set created?

This GIS layer contains an estimate of peak wave period in the shallow northern Gulf of Mexico (Alabama and a portion of the Florida coast) for a single set of wave conditions. This output is based on numerical model output of wave patterns for a given wave height scenario, corresponding to a particular set of offshore wave conditions at NOAA NDBC buoy 42040. The specific wave conditions for a given layer are indicated by the file name (of format Hh_Dd_wave_period), and in the shapefile attributes, and may be found by comparing the scenario name (Hh_Dd) to the look-up table included in the GIS zip file, wave_scenarios.txt. This data layer is intended to illustrate the spatial variability in wave period for this particular offshore wave climate scenario.

How was the data set created?

1. From what previous works were the data drawn?

   NOAA GFS (source 1 of 2)

   NOAA National Centers for Environmental Prediction (NCEP), 20110601, NOAA/NCEP Global Forecast System (GFS) Atmospheric Model: NOAA National Centers for Environmental Prediction, Camp Springs, MD.

   Online Links:

   • http://nomads.ncdc.noaa.gov/data.php

   Type_of_Source_Media: online
   Source_Contribution:

   Wind speed data at 10 m above the sea surface from the NOAA Global Forecast System (GFS) 0.5 degree model is interpolated by NOAA to the 4' Wavewatch3 grid and archived. These archived data are used to drive the numerical wave and circulation model that creates estimates of bottom shear stress.

   NOAA WW3 (source 2 of 2)

   NOAA National Centers for Environmental Prediction (NCEP, 20121001, NOAA/NWS/NCEP 4' Wavewatch III Operational Wave Forecast: NOAA National Centers for Environmental Prediction, Camp Springs, MD.

   Online Links:

   • http://polar.ncep.noaa.gov/waves/index2.shtml

   Type_of_Source_Media: online
   Source_Contribution:

   Boundary conditions for the wave model were provided by the 4' NOAA/NWS/NCEP Wavewatch III operational ocean wave forecast.

2. How were the data generated, processed, and modified?

   Date: 2012 (process 1 of 5)

   The D-Flow and D-Waves components of the Deltares Delft3D numerical model suite (version 4.00.01) were used to estimate east and north components of wind and wave-driven velocity for the offshore wave conditions corresponding to scenarios, Hh_Dd, (characteristics of which may be found in the included wave_scenarios.txt file) in each grid cell in the model domain. The wave model D-Waves, based on the Simulating WAves Nearshore (SWAN) model, is a 3rd generation phase-averaged numerical wave model which conserves wave energy subject to generation, dissipation, and transformation processes and resolves spectral energy density over a range of user-specified frequencies and directions. D-Wave was used in stationary mode. D-Flow solves the shallow water Navier Stokes equations and is run in 2-D depth-averaged mode, with linkage to D-Waves allowing the generation of wave-driven currents via wave radiation stress forcing. Default values for model parameters governing horizontal viscosity, bottom roughness, and wind drag were used. Neumann boundary conditions were used along the east, west, and south model boundaries with harmonic forcing set to zero. Model bathymetry was provided by the NOAA National Geophysical Data Center Northern Gulf Coast digital elevation map, referenced to NAVD88.
   Significant wave height, dominant wave period, and wave direction were prescribed as D-Wave TPAR format files every 30 grid cells along the model boundary using results from the NOAA Wavewatch III 4' multi-grid model for a representative moment in time corresponding to the offshore wave conditions of the scenario, the specific time of which may be found in the included wave_scenarios.txt file. A JONSWAP (JOint NOrth Sea WAve Project) spectral shape was assumed at these boundary points. Wind forcing was provided using the archived WavewatchIII 4' winds, extracted from the NOAA GFS wind model, for this time. The D-Wave directional space covers a full circle with a resolution of 5 degrees (72 bins). The frequency range was specified as 0.05-1 Hz with logarithmic spacing. Bottom friction calculations used the JONSWAP formulation with a uniform roughness coefficient of 0.067 m2/s3. 3rd-generation physics are activated, which accounts for wind wave generation, triad wave interactions and whitecapping (via the Komen et al parameterization). Depth-induced wave breaking dissipation is included using the method of Battjes and Janssen with default values for alpha (1) and gamma (0.73). Current model outputs of east and north current velocity component were extracted and interpolated to the wave model grid (staggered points in relation to the current model grid).
   The coupled model system outputs the peak wave period values included in this layer.
   NDBC observations from station 42012 for the representative scenario time periods were used to validate the wave model results. Person who carried out this activity:
   

   Joseph W. Long

   U.S. Geological Survey

   Oceanographer

   600 4th Street S

   St. Petersburg, FL
   

   USA

   (727) 803-8747 x3024 (voice)

   (727) 803-2032 (FAX)

   jwlong@usgs.gov

   Data sources used in this process:

   • NOAA GFS
   • NOAA WW3

   Data sources produced in this process:

   • DELFT3D

   Date: 2014 (process 2 of 5)

   Export the peak wave period values for each grid cell from MATLAB format into an ArcGIS polygon shapefile using the Mathworks MATLAB Mapping Toolbox (v2012A). The shapefile is written with the "shapewrite" command. Because MATLAB does not assign a projection, the projection corresponding to the projection associated with the bathymetry used in the numerical models is added in ArcCatalog 9.3. The file was then quality checked in ArcMap to ensure values were properly exported to the shapefile from MATLAB. Person who carried out this activity:
   

   P. Soupy Dalyander

   U.S. Geological Survey

   Oceanographer

   600 4th Street S

   St Petersburg, FL
   

   USA

   (727) 502-8124 (voice)

   (727) 502-8001 (FAX)

   sdalyander@usgs.gov

   Data sources used in this process:

   • DELFT3D

   Date: 13-Mar-2017 (process 3 of 5)

   Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: Alan O. Allwardt

   Contractor -- Information Specialist

   2885 Mission Street

   Santa Cruz, CA
   

   831-460-7551 (voice)

   831-427-4748 (FAX)

   aallwardt@usgs.gov

   Date: 02-Apr-2018 (process 4 of 5)

   Keywords section of metadata optimized by correcting variations of theme keyword thesauri and updating/adding keywords. Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: Arnell S. Forde

   Geologist

   600 4th Street South

   St. Petersburg, FL
   

   727-502-8000 (voice)

   aforde@usgs.gov

   Date: 13-Oct-2020 (process 5 of 5)

   Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
   

   U.S. Geological Survey

   Attn: VeeAnn A. Cross

   Marine Geologist

   384 Woods Hole Road

   Woods Hole, MA
   

   508-548-8700 x2251 (voice)

   508-457-2310 (FAX)

   vatnipp@usgs.gov

3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?
   The attribute in this data layer corresponds to peak wave period for Hh_Dd, characteristics of which may be found in the included wave_scenarios.txt file. Values will vary if a different numerical model is used to estimate the waves.
2. How accurate are the geographic locations?
   Numerical models are used in estimating the wave period values for this data layer. Because the overall horizontal accuracy of the dataset depends on the accuracy of the model, the underlying bathymetry, forcing values used, and so forth, the spatial accuracy of this data layer cannot be meaningfully quantified.
3. How accurate are the heights or depths?
   
4. Where are the gaps in the data? What is missing?
   This statistic was calculated at all locations (wet grid cells) where model output exists. Because of differences between the scenarios, not all grid cells may be included in all scenarios. The statistic was calculated for a particular scenario (Hh_Dd), the characteristics of which may be found in the included wave_scenarios.txt file. The peak wave period was calculated from wave estimates generated with Delft3D, and would vary if a different model was used or if different model inputs (such as bathymetry, forcing winds, and boundary conditions) or parameterizations were chosen.
5. How consistent are the relationships among the observations, including topology?
   No duplicate features are present. All polygons are closed, and all lines intersect where intended. No undershoots or overshoots are present.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:

Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.

1. Who distributes the data set? (Distributor 1 of 1)
   
   P. Soupy Dalyander

   U.S. Geological Survey

   Oceanographer

   600 4th Street S

   St Petersburg, FL
   

   USA

   (727) 502-8124 (voice)

   (727) 502-8001 (FAX)

   sdalyander@usgs.gov
2. What's the catalog number I need to order this data set? Hh_Dd_wave_period.shp: peak wave period (in s) for the Hh_Dd scenario. NOTE: Specific layer name indicates the scenario (Hh_Dd), with characteristics given in the included wave_scenarios.txt file.
3. What legal disclaimers am I supposed to read?

   Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.
   Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	WinZip archive file containing the shapefile components. The WinZip file also includes FGDC compliant metadata. in format SHP (version 3.3) ESRI shapefile Size: 35
     Network links:	https://pubs.usgs.gov/of/2012/1234/datafiles.html

   • Cost to order the data: None

5. What hardware or software do I need in order to use the data set?

   These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.

Who wrote the metadata?

Dates:

Last modified: 13-Oct-2020

Metadata author:

U.S. Geological Survey

Attn: P. Soupy Dalyander

Oceanographer

600 4th Street S

St Petersburg, FL

USA

(727) 502-8124 (voice)

(727) 502-8001 (FAX)

sdalyander@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)