Impacts of Proposed Sediment Borrow Pits on the Nearshore Wave Climate and Longshore Transport Rate along Breton Island, LA: G4_Hh_Dd_wave_direction

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: P. Soupy Dalyander
Originator: Rangley C. Mickey
Originator: Joseph W. Long
Originator: James G. Flocks
Publication_Date: 2015
Title:
Impacts of Proposed Sediment Borrow Pits on the Nearshore Wave Climate and Longshore Transport Rate along Breton Island, LA: G4_Hh_Dd_wave_direction
Edition: 1.0
Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon)
Publication_Information:
Publication_Place:
St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <http://pubs.usgs.gov/of/2015/1055/datafiles.html>
Larger_Work_Citation:
Citation_Information:
Originator: P. Soupy Dalyander
Originator: Rangley C. Mickey
Originator: Joseph W. Long
Originator: James G. Flocks
Publication_Date: 2015
Title:
Impacts of Proposed Sediment Borrow Pits on the Nearshore Wave Climate and Longshore Transport Rate along Breton Island, LA
Edition: 1.0
Geospatial_Data_Presentation_Form: Multimedia presentation
Series_Information:
Series_Name: Open-File Report (OFR)
Issue_Identification: 2015-1055
Publication_Information:
Publication_Place:
St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL
Publisher: U.S. Geological Survey
Online_Linkage: <http://pubs.usgs.gov/of/2015/1055/index.html>
Description:
Abstract:
As part of a plan to preserve Breton Island, the southernmost extent of the Chandeleur Islands and part of the Breton Island National Wildlife Refuge, the National Fish and Wildlife Service (FWS) plans to nourish the island with sand supplied from offshore sand resources. The planned sand extraction sites are offshore of the island to the east and south in 5-10 m of water. Because borrow pits are perturbations to shallow-water bathymetry, they can impact the wave field in a variety of ways, and may result in alterations in sediment transport and new erosional or accretional patterns along the beach. For the present study, a scenario-based numerical modeling strategy was used to assess the impacts of the proposed borrow pits on the nearshore wave field. Impacts were assessed over a range of wave conditions, and were gauged by changes in significant wave height and wave direction inshore of the borrow sites.
Purpose:
This GIS layer contains an estimate of mean wave direction in the shallow northern Gulf of Mexico for a single set of wave conditions. This output is based on a numerical model output of wave patterns for a given wave height scenario, corresponding to a particular set collected during 1995-2013 of offshore wave conditions at National Oceanic and Atmospheric Administration (NOAA) National Data Buoy Center (NDBC) buoy 42040. The specific wave conditions for a given layer are indicated by the file name (of format Hh_Dd_wave_direction), in the shapefile attributes, and may be found by comparing the scenario name (Hh_Dd) to the look-up table (wave_scenarios.txt) included in the GIS zip file located at <http://pubs.usgs.gov/of/2014/xxxx/datafiles.html> (G4_H1_D1_wave_direction.zip). Shapefile attributes for the other G4 grids with pit 1 and 2 present can be found at <http://pubs.usgs.gov/of/2014/xxxx/datafiles.html> (G4_P1_H1_D1_wave_direction.zip) and <http://pubs.usgs.gov/of/2014/xxxx/datafiles.html> (G4_P2_H1_D1_wave_direction.zip). This data layer is intended to illustrate the spatial variability in mean wave direction for this particular offshore wave climate scenario.
Supplemental_Information:
This data layer is a subset of USGS Open-File Report 2015-1055, Impacts of Proposed Sediment Borrow Pits on the Nearshore Wave Climate and Longshore Transport Rate along Breton Island, LA. It is part of a set of data layers showing the spatial variability in mean wave direction for a range of offshore wave condition scenarios. Wave scenario dates correspond to active buoy dates and range between December 4, 1995 to December 30, 2013. For grid G4, there were three separate grids used in this project to consider changes in wave climate based on two potential sediment borrow pits. The data corresponding to G4_Hh_Dd contains results from grid G4 that has no pit present. Data corresponding to G4_P1_Hh_Dd contains results from grid G4 with the pit 1 configuration present. Data corresponding to G4_P2_Hh_Dd contains results from grid G4 with the pit 2 configuration present.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19951204
Ending_Date: 20131230
Currentness_Reference: ground condition
Status:
Progress: complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.2322136333
East_Bounding_Coordinate: -89.0421633798
North_Bounding_Coordinate: 29.5224253171
South_Bounding_Coordinate: 29.4216387757
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: St. Petersburg Coastal and Marine Science Center
Theme_Keyword: SPCMSC
Theme_Keyword: waves
Theme_Keyword: borrow pits
Theme:
Theme_Keyword_Thesaurus: ISO 9115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Content
Place_Keyword: Gulf of Mexico
Place_Keyword: Louisiana
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Breton Island
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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey, USGS Southeast Area
Contact_Person: P. Soupy Dalyander
Contact_Position: Research Oceanographer
Contact_Address:
Address_Type: Mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: US
Contact_Voice_Telephone: 727-502-8124
Contact_Facsimile_Telephone: 727-502-8001
Contact_Electronic_Mail_Address: sdalyander@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2015/1055/datadirectory/G4_bathymetry.jpg>
Browse_Graphic_File_Description:
Graphic showing the numerical model domain with the no pit configuration over which analysis was conducted.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2014/xxxx/datadirectory/G4_P1_bathymetry.jpg>
Browse_Graphic_File_Description:
Graphic showing the numerical model domain with the pit 1 configuration over which analysis was conducted.
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name:
<http://pubs.usgs.gov/of/2014/xxxx/datadirectory/G4_P2_bathymetry.jpg>
Browse_Graphic_File_Description:
Graphic showing the numerical model domain with the pit 2 configuration over which analysis was conducted.
Browse_Graphic_File_Type: JPEG
Data_Set_Credit: U.S. Geological Survey
Native_Data_Set_Environment:
Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.2.1.3497
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The WaveDirect attribute in this data layer corresponds to mean wave direction 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.
Logical_Consistency_Report:
No duplicate features are present. All polygons are closed, and all lines intersect where intended. No undershoots (lines falling short of the line they should intersect to form the polygon) or overshoots (lines crossing over the line they should intersect to form the polygon) are present.
Completeness_Report:
Mean wave direction 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 mean wave direction was calculated for a particular scenario (Hh_Dd), the characteristics of which may be found in the included wave_scenarios.txt file. The mean wave direction was calculated from wave estimates generated with NOAA's Wavewatch III and Delft University of Technology's Simulating WAves Nearshore (SWAN) software and would vary if a different model were used or if different model inputs (such as bathymetry, forcing winds, and boundary conditions) or parameterizations were chosen.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Numerical models are used in estimating the mean wave direction 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.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical datum is North American Vertical Datum of 1988 (NAVD88) with an estimated resolution of 0.01 m.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: NOAA National Centers for Environmental Predictions (NCEP)
Publication_Date: 201405
Title: NOAA/NCEP Global Forecast System (GFS) Atmospheric Model
Geospatial_Data_Presentation_Form: Digital and/or Hardcopy Resources
Publication_Information:
Publication_Place: Camp Springs, MD
Publisher: NOAA National Centers for Environmental Prediction
Online_Linkage: <http://nomads.ncdc.noaa.gov/data.php>
Type_of_Source_Media: Digital and/or Hardcopy Resources
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20050301
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: NOAA GFS
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' Wavewatch III grid and archived. These archived data are used to drive the numerical wave and circulation model that creates estimates of bottom shear stress.
Process_Step:
Process_Description:
The Simulation WAves Nearshore (SWAN) model (v.41.01) was used to estimate the spectral wave field for the offshore wave conditions corresponding to this scenario Hh_Dd (characteristics of which may be found in the included wave_scenarios.txt file) in each grid cell in the model domain. SWAN 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. 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 mean wave direction were prescribed as SWAN TPAR format files every 5 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, and the specific time, 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 Wavewatch III 4' winds, extracted from the NOAA GFS wind model, for this time. The SWAN directional space covers a full circle with a resolution of 6 degrees (60 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 m^2/s^3. 3rd-generation physics are activated, which accounts for wind wave generation and white capping (via the Komen et al parameterization). The model system outputs the mean wave direction values included in this layer.
Process_Date: 20140522
Process_Step:
Process_Description:
Exported the mean wave direction values for each grid cell from MATLAB format into an ArcGIS polygon shapefile using the Mathworks MATLAB Mapping Toolbox (v2014A). The shapefile was written with the "shapewrite" command via MATLAB; but because MATLAB does not assign a projection during export, projections associated with the bathymetry used in the numerical models were later added in ArcCatalog 10.2. The file was then quality checked in ArcMap to ensure values were properly exported to the shapefile from MATLAB.
Process_Date: 20140522
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Gulf of Mexico
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-Polygon
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0197890536
Longitude_Resolution: 0.0226978275
Geographic_Coordinate_Units: Decimal seconds
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563
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.
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: G4_Hh_Dd_wave_direction
Entity_Type_Definition: Mean wave direction for specific wave scenarios.
Entity_Type_Definition_Source: USGS
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: Esri
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: Scenario_H
Attribute_Definition:
Scenario wave height number (e.g. "h" in Hh_Dd, see wave_scenarios.txt)
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 8
Attribute_Units_of_Measure: non-dimensional
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: Scenario_D
Attribute_Definition:
Scenario wave direction number (e.g. "d" in Hh_Dd, see wave_scenarios.txt)
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 16
Attribute_Units_of_Measure: non-dimensional
Attribute_Measurement_Resolution: 1
Attribute:
Attribute_Label: WaveDirection
Attribute_Definition: mean wave direction
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 360
Attribute_Units_of_Measure: degrees
Attribute_Measurement_Resolution: 0.01
Overview_Description:
Entity_and_Attribute_Overview:
The entity and attribute information provided here describes the tabular data associated with the dataset. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the dataset.
Entity_and_Attribute_Detail_Citation:
The entity and attribute information was 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.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey, USGS Southeast Area
Contact_Person: P. Soupy Dalyander
Contact_Position: Research Oceanographer
Contact_Address:
Address_Type: Mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: US
Contact_Voice_Telephone: 727-502-8124
Contact_Facsimile_Telephone: 727-502-8001
Contact_Electronic_Mail_Address: sdalyander@usgs.gov
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SHP
Format_Version_Number: 10.2.1
Format_Specification: Esri shapefile
Format_Information_Content:
WinZip archive file containing the shapefile components. The WinZip file also includes FGDC compliant metadata.
File_Decompression_Technique: WinZip 12.0 archive
Transfer_Size: 73.3 MB
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://pubs.usgs.gov/of/2015/1055/datafiles.html>
Fees: None. No fees are applicable for obtaining the dataset.
Metadata_Reference_Information:
Metadata_Date: 20140527
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: P. Soupy Dalyander
Contact_Organization: U.S. Geological Survey, USGS Southeast Area
Contact_Position: Research Oceanographer
Contact_Address:
Address_Type: Mailing
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: US
Contact_Voice_Telephone: 727-502-8124
Contact_Facsimile_Telephone: 727-502-8001
Contact_Electronic_Mail_Address: sdalyander@usgs.gov
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.12 on Tue Mar 24 16:46:33 2015