Seismic Hazard and Risk Assessments in Tillamook County, Oregon

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Zhenming Wang
Originator: Carol S. Hasenberg
Originator: Gregory B. Graham
Originator: Franz N. Rad
Publication_Date: 20011231
Publication_Time: Unknown
Title:
Seismic Hazard and Risk Assessments in Tillamook County, Oregon
Edition: Version 1
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open File Report
Issue_Identification: O-01-06
Publication_Information:
Publication_Place: Portland, OR
Publisher:
Oregon Department of Geology and Mineral Industries
Other_Citation_Details: A text accompanies the vector digital data
Online_Linkage: www.oregongeology.com
Description:
Abstract:
This project assesses the potential earthquake hazards and risk posed by the Cascadia subduction earthquakes to Tillamook County, Oregon. The first step is developing relative hazard maps. The relative seismic hazard maps depict the potential for ground motion amplification, liquefaction, and earthquake-induced landslides due to local geologic conditions. The relative seismic hazard maps for Tillamook County were developed from geological, geophysical, hydrological, and topographical data. These maps show that areas with the highest ground amplification and liquefaction hazard are concentrated in the bays and valleys and along the coast, while areas with high earthquake-induced landslide hazard are primarily in the steeper mountainous areas. Landslides are also expected along the coastal bluffs.
Purpose:
To assist local governments, land use planners, and emergency managers to prioritize areas for hazard mitigation and risk reduction.
Supplemental_Information:
Digital map data files include: Map1 (UBC-97), Map2 (liquefaction potential), Map3 (earthquake-induced landslide hazard)
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2000
Ending_Date: 2001
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Final report late 2002
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -124.03
East_Bounding_Coordinate: -123.295
North_Bounding_Coordinate: 45.7871
South_Bounding_Coordinate: 45.0419
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Geology
Theme_Keyword: Geologic hazards
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Oregon
Place_Keyword: Tillamook County
Stratum:
Stratum_Keyword_Thesaurus: None
Temporal:
Temporal_Keyword_Thesaurus: None
Access_Constraints: None
Use_Constraints:
The hazard zones shown on the Relative Earthquake Hazard Maps should not serve as a substitute for site-specific evaluations based on subsurface information gathered at a site.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Yumei Wang
Contact_Organization:
Oregon Department of Geology and Mineral Industries
Contact_Position: Geotechnical engineer
Contact_Address:
Address_Type: mailing and physical address
Address: 800 NE Oregon Street
City: Portland
State_or_Province: Oregon
Postal_Code: 97232
Country: USA
Contact_Voice_Telephone: 503 731-4100 x226
Contact_Facsimile_Telephone: 503 731-4066
Browse_Graphic:
Browse_Graphic_File_Name: OFR01-06text.pdf
Browse_Graphic_File_Description: text accompanying digital map data files
Browse_Graphic_File_Type: portable document file (viewing)
Data_Set_Credit: Zhenming Wang
Security_Information:
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: None
Native_Data_Set_Environment: MapInfo GIS ver. 6.0
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: The data was assembled and checked by the authors.
Completeness_Report:
This preliminary report is complete for Tillamook County, Oregon. The report and map data have not been reviewed.
Lineage:
Process_Step:
Process_Description:
Engineering properties of geologic materials were derived from existing geological, geotechnical, coring, and water-well data and limited field investigations (geophysics). These data were used to construct three-dimensional geologic models, using MapInfo and Vertical Mapper GIS software. Ground motion amplification hazard derived from a three-dimensional geologic model with 30m by 30m grid space using GIS software to assign hazard values on the basis of the UBC-97 methodology. Liquefaction hazard was derived in a similar manner, by use of the age and depositional environment of the geologic units and a simplified state-of-practice engineering analysis.
Spatial_Data_Organization_Information:
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:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name:
Universal_Transverse_Mercator:
Universal_Transverse_Mercator:
UTM_Zone_Number: 10
Transverse_Mercator:
Longitude_of_Central_Meridian: -123
Latitude_of_Projection_Origin: 0
False_Easting: 500000
False_Northing: 0
Scale_Factor_at_Central_Meridian: .9996
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: .01
Ordinate_Resolution: .01
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
See accompanying text for a discussion and explanation of digital map data attributes.
Entity_and_Attribute_Detail_Citation:
Oregon Department of Geology and Mineral Industries Open File Report O-01-06
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Nature of the Northwest Info Center (NNWIC)
Contact_Person: Donald Haines
Contact_Position: manager
Contact_Address:
Address_Type: mailing and physical address
Address: 800 NE Oregon Street
City: Portland
State_or_Province: OR
Postal_Code: 97232
Country: USA
Contact_Voice_Telephone: 503/872-2750
Contact_TDD/TTY_Telephone: unavailable
Contact_Facsimile_Telephone: 503/731-4066
Contact_Electronic_Mail_Address: http://www.naturenw.org
Hours_of_Service: 9:00 a.m. to 5:00 p.m. Monday Through Friday
Resource_Description: DOGAMI Open File Report O-01-06
Distribution_Liability:
Although these data have been processed successfully on a computer system at the Oregon Department of Geology and Mineral Industries (DOGAMI), no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from DOGAMI, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The Oregon Department of Geology and Mineral Industries shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: MapInfo .tab and .mif/mid
Format_Version_Number: 6.0
Format_Specification: None
Format_Information_Content: MapInfo GIS native and interchange files
File_Decompression_Technique: No compression applied
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Compatibility_Information: None
Fees: $10
Metadata_Reference_Information:
Metadata_Date: 20011231
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Paul Staub
Contact_Organization:
Oregon Department of Geology and Mineral Industries
Contact_Position: Spatial Data Specialist
Contact_Address:
Address_Type: mailing address
Address: Suite 965
Address: 800 NE Oregon Street
City: Portland
State_or_Province: Oregon
Postal_Code: 97232
Country: USA
Contact_Voice_Telephone: 503/731-4100 x224
Contact_Facsimile_Telephone: 503/731-4066
Contact_Electronic_Mail_Address: Paul.Staub@state.or.us
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None
Generated by mp on Fri Dec 21 15:14:16 2001