Detailed Ground Penetrating Radar Profiles Showing Coastline Depositional Rates, Washington

Metadata:

• Identification_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Portland State University, Department of Geology

Publication_Date: Unpublished material

Publication_Time: Unknown

Title:

Detailed Ground Penetrating Radar Profiles Showing Coastline Depositional Rates, Washington

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Portland, OR USA

Publisher: Portland State University

Other_Citation_Details:

Brian P. Thayer and Harry M. Jol, Department of Geography, University of Wisconsin-Eau Claire, Eau Claire, thayerbp@uwec.edu.; George Kaminsky and Peter Ruggiero, Washington Department of Ecology, Olympia, WA 98504-7690. The major support for this project comes from the Southwest Washington Coastal Erosion Study-United States Geological Survey (USGS). Further support comes from Sensors and Software, University of Wisconsin-Eau Claire, Portland State University, University College of the Fraser Valley and Grays Harbor College.

Online_Linkage: nwdata.geol.pdx.edu

Description:

Abstract:

Ground penetrating radar (GPR) studies were performed along the shoreline of Washington during the summers from 1998 through 2001 as part of the Southwest Washington Coastal Erosion Study. GPR is based on the propagation and reflection of high-energy, electromagnetic radio waves in order to observe the near subsurface. Over the last five years, studies in Washington have produced large amounts of spatial data which has been placed in a geographic information system (GIS). From the GIS database, old shorelines deposited within the last 150 years were noted. The transects were then surveyed by global positioning systems (GPS) which allowed the integration of GPR data into the GIS database. GPS also provided topography to the GPR transects which enhanced interpretation of the collected data. Further interpretation and analysis of the database led to the discovery of valuable information regarding past coastal depositional rates along the shoreline. This was found by matching up the past shorelines in the GIS database with specific depositional features within the GPR transects. Finding the structured radar patterns of the known shorelines in the GPR transects will help in further defining more past shorelines.

Purpose:

The GPR datasets were collected during a field based research program during the summer between 1998 1) To prove whether or not the application of global positioning systems (GPS) on GPR transects will allow the integration of GPR profiles into a geographic information system (GIS). 2) To find similarly structured radar patterns in the collected GPR profiles using known shoreline positions as a reference. 3) To use these similar radar patterns to a) explain whether events that have shaped the coastline took place during the same time periods on all GPR profiles and b) define more shoreline positions to gain a better understanding of current erosional/depositional rates. 4) To collect three-dimensional GPR grids to gain a clear spatial understanding of subsurface strata which could help significantly in locating paleo-beachfaces. 5) To find whether or not erosional scarps found on GPR profiles coincide with El Niño years using known shoreline positions as a reference. 6) To aid in developing the Southwest Washington Coastal Erosion Study's GIS database.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19980600

Ending_Date: 20020930

Currentness_Reference: Publication Date

Status:

Progress: In work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -124.240000

East_Bounding_Coordinate: -123.890000

North_Bounding_Coordinate: +47.260000

South_Bounding_Coordinate: +46.000000

Keywords:

Theme:

Theme_Keyword_Thesaurus: Tri - Service Spatial Data Standard

Theme_Keyword: Geology

Theme_Keyword: Coastal Deposition

Theme_Keyword: ground penetrating radar

Place:

Place_Keyword_Thesaurus: Geographic Names Information System

Place_Keyword: Washington

Access_Constraints: None

Use_Constraints:

The authors require that they be informed of any use of these data. An email to the contact person is appropriate for this purpose.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: David Percy

Contact_Organization: Portland State University, Dept of Geology

Contact_Position: GIS Manager

Contact_Address:

Address_Type: mailing and physical address

Address:

Portland State University Department of Geology Room 17 Cramer Hall 1721 SW Broadway

City: Portland

State_or_Province: OR

Postal_Code: 97201

Country: USA

Contact_Voice_Telephone: 503-725-3373

Contact_Electronic_Mail_Address: percyd@pdx.edu

Metadata_Reference_Information:

Metadata_Date: 20010809

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: David Percy

Contact_Organization: Portland State University Department of Geology

Contact_Position: GIS Manager

Contact_Address:

Address_Type: mailing and physical address

Address:

Portland State University Department of Geology Room 17 Cramer Hall 1721 SW Broadway

City: Portland

State_or_Province: OR

Postal_Code: 97201

Country: USA

Contact_Voice_Telephone: 503-725-3373

Contact_Electronic_Mail_Address: percyd@pdx.edu

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None