Big Creek Zone 2 Relative Risk Area
Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information
Identification Information
Section Index
Citation:
Citation Information:
Originator: Oregon Department of Land Conservation and Development
Publication Date: 200106
Title: Big Creek Zone 2 Relative Risk Area
Edition: 2001
Geospatial Data Presentation Form: Map
Publication Information:
Publication Place: Salem, Oregon
Publisher: Oregon Ocean-Coastal Management Program
Other Citation Details:
The Newport Littoral Cell GIS was the inventory component
of the littoral cell planning effort. It was a jointly
funded project between NOAA Coastal Service Center, and the
Oregon Coastal Management Program.
Online Linkage: http://www.lcd.state.or.us/coast/
Larger Work Citation:
Citation Information:
Originator:
Shoreland Solutions; Oregon Department of Land Conservation
and Development
Publication Date: 200106
Title: Oregon Coastal Natural Hazards Geographic Information System
Publication Information:
Publication Place: Salem, Oregon
Publisher:
Shoreland Solutions; Oregon Department of Land Conservation
and Development
Online Linkage: http://www.lcd.state.or.us/coast/
Description:
Abstract:
This shapefile represents the Zone 2 Relative Risk in the
Big Creek segment of the Newport Littoral cell. As
Big Creek is characterized as a bluff-backed
deep-seated slide area, the width of 'Zone 2' is calculated
using variations on a general methodology involving a
geometric model defined by Komar et al., (1999).
Purpose:
The object of the hazard assessment is to identify the
areas most susceptible to erosion and provide a sensitivity
analysis bracketing the areas that could potentially erode.
The first step characterizes the shoreline and backshore
identifying the dune, bluff or sea cliff, and inlet-backed
shoreline segments. For each of these types of shoreline
segments, a different risk methodology was applied.
Supplemental Information:
Headlands on the Oregon Coast segment the shoreline into a
series of compartments known as littoral cells or sandsheds
that form a natural boundary to study the regional effects
of coastal erosion. Oregon has taken a regional approach to
coastal hazards planning. By understanding regional
sediment dynamics and processes, coastal hazards can be
better understood and avoided. Three
primary components of littoral cell planning include
inventory, risk assessment and implementation. Inventory
data depicting physical, cultural, and risk themes was
collected at a tax parcel scale (1:1,200) and incorporated
into a GIS (Marra 1995). The risk assessment applies
several techniques to identify hazardous areas along the
ocean front. Some of these techniques include: air photo
analyses of historical shorelines, comparison of historic
beach and bluff profiles (including LIDAR), geologic
mapping, house to bluff measurements, and the application
of a geometric model of dune erosion. The inventory and
risk analyses inputted into the GIS facilitate hazard and
policy analyses and expedite oceanfront planning. Benefits
of sandshed planning include consistent hazard assessment,
reduction of cumulative and adverse impacts, and
incorporation of science into the decision making process.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 1995
Beginning Time: Unknown
Ending Date: 2001
Ending Time: Unknown
Currentness Reference: 2001
Status:
Progress: Complete
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -120.6835
East Bounding Coordinate: -120.6763
North Bounding Coordinate: 51.4519
South Bounding Coordinate: 51.4459
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: risk zone
Theme Keyword: relative risk
Theme Keyword: hazards
Theme Keyword: erosion
Place:
Place Keyword Thesaurus: None
Place Keyword: newport
Place Keyword: Big Creek
Place Keyword: oregon
Place Keyword: northwest
Access Constraints: None
Use Constraints: None
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Shoreland Solutions
Contact Person: John Marra
Contact Position: Geologist
Contact Address:
Address Type: mailing and physical address
Address: 800 NE Oregon St #18
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA
Contact Voice Telephone: (503) 373-0050
Contact Facsimile Telephone: (503) 731-4068
Contact Electronic Mail Address: marrajj@fbo.com
Native Data Set Environment: ArcView version 3.2 shapefile format
Data Quality Information
Section Index
Completeness Report:
The data are complete for the specified area. See the other
12 segments of shoreline for a complete picture of relative
risk in the Newport littoral cell.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report:
Variations on a general methodology defined in Komar et
al., (1999) have been used to assess relative risk along
dune-backed shorelines. Central to this methodology is the
concept of the geometric model, which defines the landward
extent of foredune retreat projected to occur during
extreme storm events as:
Emax = [(WL - Hj) + DBL]/Tan b
Where WL is the total water level achieved during a storm
Hj is the elevation of the beach/dune junction; DBL is the
vertical shift in the beach profile that can result from
the presence of a rip current; and Tan b is the beach
slope.
The following variables were used to determine the total
water level in the geometric model and in turn to establish
the width of 'zone 1' along dune-backed shorelines;
¨ 47.6 feet significant wave height;
¨ 17 second peak spectral wave period;
¨ 7.55 feet Mean Higher High Tide;
¨ 1.31 feet monthly mean water level; and
¨ 3.28 feet storm surge.
It should be noted that these values are comparable to
those observed during a major La Nina storm that hit the
Oregon coast on March 2-3, 1999.
The following variables were used to determine the total
water level in the geometric model and in turn to establish
the width of 'zone 2' along dune-backed shorelines;
¨ 52.5 feet significant wave height;
¨ 20 second peak spectral wave period;
¨ 7.55 feet Mean Higher High Tide;
¨ 1.31 feet monthly mean water level;
¨ 5.58 feet storm surge; and
¨ 1.31 feet sea level rise.
Values for the elevation of the beach/dune junction (10.83
feet) and the beach slope (0.03) used in the geometric
model were obtained through analysis of the 1998 LIDAR
digital elevation model and field reconnaissance surveys.
The calculated distances are measured landward from the
beach/dune junction. The location of this reference feature
was established through analysis of aerial photographs and
the 1998 LIDAR digital elevation model.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: Oregon Department of Land Conservation and Development
Publication Date: 200106
Title: Big Creek Zone 1 Relative Risk Area
Edition: 2001
Geospatial Data Presentation Form: map
Publication Information:
Publication Place: Salem, Oregon
Publisher: Oregon Ocean-Coastal Management Program
Online Linkage: http://www.lcd.state.or.us/coast/
Larger Work Citation:
Citation Information:
Originator:
Shoreland Solutions; Oregon Department of Land Conservation
and Development
Publication Date: 200106
Title: Oregon Coastal Natural Hazards Geographic Information System
Publication Information:
Publication Place: Salem, Oregon
Publisher:
Shoreland Solutions; Oregon Department of Land Conservation
and Development
Online Linkage: http://www.lcd.state.or.us/coast/
Source Scale Denominator: 1200
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Time: Unknown
Ending Time: Unknown
Source Information:
Source Citation:
Citation Information:
Originator: Oregon Department of Land Conservation and Development
Publication Date: 200106
Title: Big Creek Zone 1 Relative Risk Area
Edition: 2001
Geospatial Data Presentation Form: map
Publication Information:
Publication Place: Salem, Oregon
Publisher: Oregon Ocean-Coastal Management Program
Online Linkage: http://www.lcd.state.or.us/coast/
Larger Work Citation:
Citation Information:
Originator:
Shoreland Solutions; Oregon Department of Land Conservation
and Development
Publication Date: 200106
Title: Oregon Coastal Natural Hazards Geographic Information System
Publication Information:
Publication Place: Salem, Oregon
Publisher:
Shoreland Solutions; Oregon Department of Land Conservation
and Development
Online Linkage: http://www.lcd.state.or.us/coast/
Source Scale Denominator: 1200
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Time: Unknown
Ending Time: Unknown
Process Step:
Cloud Cover: 0
Spatial Data Organization Information
Section Index
Direct Spatial Reference Method: Vector
Point and Vector Object Information:
SDTS Terms Description:
SDTS Point and Vector Object Type: GT-polygon composed of chains
Point and Vector Object Count: 1
Spatial Reference Information
Section Index
Horizontal Coordinate System Definition:
Planar:
Map Projection:
Map Projection Name: Lambert Conformal Conic
Lambert Conformal Conic:
Standard Parallel: 43
Standard Parallel: 45.5
Longitude of Central Meridian: -120.5
Latitude of Projection Origin: 41.75
False Easting: 400000
False Northing: 0
Planar Coordinate Information:
Planar Coordinate Encoding Method: Coordinate Pair
Coordinate Representation:
Abscissa Resolution: 0
Ordinate Resolution: 0
Planar Distance Units: international feet
Geodetic Model:
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137
Denominator of Flattening Ratio: 298.257
Entity and Attribute Information
Section Index
Detailed Description:
Entity Type:
Entity Type Label: s1z1py.dbf
Entity Type Definition: Shapefile Attribute Table
Entity Type Definition Source: None
Attribute:
Attribute Label: Area
Attribute Definition: Area of polygon
Attribute Definition Source: Software generated
Attribute Domain Values:
Unrepresentable Domain: Software computed
Attribute:
Attribute Label: Hectares
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 98.574
Range Domain Maximum: 98.574
Attribute:
Attribute Label: Id
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0
Range Domain Maximum: 0
Attribute:
Attribute Label: Perimeter
Attribute Definition: Perimeter of polygon
Attribute Definition Source: Software generated
Attribute Domain Values:
Unrepresentable Domain: Software computed
Attribute:
Attribute Label: Ref
Attribute Definition: Identified Reference Feature (relative risk zone reference number)
Attribute Domain Values:
Unrepresentable Domain: Character Field
Attribute:
Attribute Label: Rzw
Attribute Definition:
Relative Risk Zone Width - calculated average value of high
relative risk for given risk zone (feet from reference feature).
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 120
Range Domain Maximum: 120
Attribute:
Attribute Label: S1z1py_
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 2
Range Domain Maximum: 2
Attribute:
Attribute Label: S1z1py_id
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 1
Range Domain Maximum: 1
Attribute:
Attribute Label: Setting
Attribute Definition: General morphologic setting of reference location
Attribute Domain Values:
Unrepresentable Domain: Character Field
Distribution Information
Section Index
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Oregon Department of Land Conservation and Development
Contact Person: Randy Dana
Contact Position: GIS Coordinator
Contact Address:
Address Type: mailing and physical address
Address: 800 NE Oregon St #18
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA
Contact Voice Telephone: 503-731-4065 x 31
Contact Facsimile Telephone: 503-731-4068
Contact Electronic Mail Address: randy.dana@state.or.us
Distribution Liability:
THE DATA AND ASSOCIATED DATA FILES ON THIS CD-ROM ARE
PROVIDED ""AS IS,"" WITHOUT WARRANTY TO THEIR PERFORMANCE,
MERCHANTABLE
STATE, OR FITNESS FOR ANY PARTICULAR PURPOSE. THE ENTIRE
RISK
ASSOCIATED WITH THE RESULTS AND PERFORMANCES OF THE DATA IS
ASSUMED
BY THE USER. THIS DATA IS NOT FOR NAVIGATIONAL OR LEGAL PURPOSES.
Custom Order Process: Please Contact Randy Dana at the Oregon Coastal program of DLCD.
Metadata Reference Information
Section Index
Metadata Date: 1/1/2001
Metadata Review Date:
Metadata Future Review Date:
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Oregon Department of land Conservation and Development
Contact Person: Tanya Haddad
Contact Position: NOAA CSC Fellow
Contact Address:
Address Type: Mailing and physical address
Address: 800 NE Oregon St #18
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA
Contact Voice Telephone: (503) 731-4065 x30
Contact Facsimile Telephone: (503)731-4068
Contact Electronic Mail Address: tanya.haddad@state.or.us
Metadata Standard Name: FGDC CSDGM
Metadata Standard Version: FGDC-STD-001-1998
SMMS Metadata report generated 10/2/2002