Wave Energy Device Feasibility in Deep-water areas, OWET, 2012
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: Parametrix, on behalf of Oregon Wave Energy Trust
Publication Date: 20120109
Title: Wave Energy Device Feasibility in Deep-water areas, OWET, 2012
Geospatial Data Presentation Form: vector digital data
Other Citation Details: Oregon Wave Energy Trust Industry Area Mapping for the Territorial Sea Plan Process
Description:
Abstract:
The data layer identifies the area most suitable for siting and operating deep-water wave energy devices based on the economically-constrained deep-water device feasibility model results. Device feasibility model results are driven entirely by engineering and technical criteria, including practical assumptions of economic viability based on cabling, anchoring, and access.
Purpose:
The data is intended to illustrate the most suitable areas for siting and operating deep-water wave energy devices. This assessment of wave energy device suitability is intended to satisfy questions regarding engineering and technical suitability. This data does not attempt to reconcile opportunities to site and operate wave energy devices with alternative existing or future uses.
Supplemental Information:
The Deep-water Wave Energy Device Feasibility data layer reflects technology constraints for deep-water wave energy devices that are often anchored at depths of 50m to 75m, including point absorber, oscillating water column, and attenuator and pivot device types. Point absorber wave energy devices contain floating structures that absorb energy in all direction through its movements at or near the water surface. Deep-water offshore oscillating water column wave energy devices capture the surge generated by waves within a chamber that is used to drive air through an above-surface turbine. Attenuator or Pivot wave energy devices capture the energy of passing waves via of the resistance of an articulated joint that is moved around a pivot to generate electricity. This data layer delineates the top 5%, 11%, 20% and 41% of all Deep-Water Device Feasibility Scores. The Deep-Water Wave Energy Device Feasibility Conceptual Model identifies the landscape attributes and scoring used to model suitability in an economically-constrained nvironment. In this pre-commercial context, wave energy devices do not generate significant revenue, and as a result, the suitability scoring reflects the financial importance of proximity to shore and a potential grid connection.
In addition to demonstrating where it is technically feasible to site wave energy devices, Parametrix developed a sub-set of device suitability parameters to model the feasibility of siting wave energy devices in an economically-constrained environment. Relative to the parameters used to model technical feasibility for siting wave energy devices, the economically-constrained parameters further limit the feasibility of siting wave energy devices based on proximity to the electrical grid. The goal is to provide the Department of Land Conservation and Development (DLCD) with a final data product that can be integrated into Marine Map for use in the TSP process in 2012. The agency intends to develop a series of management scenarios for the Part 5 amendment, and the suitability areas are needed to encourage the designation of areas in the territorial sea that will have a better chance of meeting tangible device and development requirements. The economically-constrained wave energy device suitability models are currently being used for this process, since these models better represent the current challenges and opportunities facing wave energy project developers.
Additional information on the methodology followed to develop wave energy device feasibility models is provided in the Technical Memorandum titled "Industry Area Mapping for TSP Process".
Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 2012
Time of Day: Unknown
Currentness Reference: publication date
Status:
Progress: Complete
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -124.971019
East Bounding Coordinate: -123.75844
North Bounding Coordinate: 46.221285
South Bounding Coordinate: 41.983768
Keywords:
Theme:
Theme Keyword Thesaurus: NA
Theme Keyword: Wave Energy
Theme Keyword: Device Feasibility
Place:
Place Keyword Thesaurus: NA
Place Keyword: Oregon Coast
Place Keyword: Offshore Areas
Access Constraints: Requests to Access and use this data must be approved in writing by Oregon Wave Energy Trust.
Use Constraints:
Designation of areas suitable for wave energy development is a difficult task requiring careful consideration of environmental, socioeconomic, and regulatory constraints. The data identifies areas suitable for wave energy that, if developed, may create conflict with existing uses.
Currently, the data available to populate the wave energy device suitability models does not capture the possible interaction of many offshore islands and rock formations that may alter the wave regime in the southern extent of the Oregon Coast. As a result, the area offshore between Port Orford and the California border requires further study to accurately assess the suitability of siting and operating wave energy devices in this area.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Oregon Wave Energy Trust
Contact Address:
Address Type: mailing address
Address: P.O. Box 8626
City: Portland
State or Province: OR
Postal Code: 97207
Country: USA
Contact Voice Telephone: 503-224-1966
Contact Electronic Mail Address: info@oregonwave.org
Native Data Set Environment: Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4000
Data Quality Information
Section Index
Attribute Accuracy:
Attribute Accuracy Report: We have assumed all wave energy to be equal regimes along the Oregon coast and, as a result, valued as one within the model.
Logical Consistency Report:
It should be emphasized that while every effort has been taken to ensure that the scoring system is logical, credible, and reflective of reality, there may be specific issues associated with particular technologies that take that technology outside the notional class envelope. Given the early stage of technology development and the gradients that apply to most criteria, such deviations are not considered to be critical.
Completeness Report:
The economically-constrained deep-water wave energy device feasibility model evaluates the feasibility of siting offshore wave energy devices, such as point absorber and offshore attenuator/pivot devices, in a pre-commercial context. In this context, wave energy devices do not generate significant revenue, and as a result, the suitability scoring reflects the financial importance of proximity to shore and a potential grid connection.
The three sub-models that determine deep-water wave energy device feasibility include site quality, grid connection, and shore-side support. The site quality sub-model evaluates the suitability of a potential site to provide adequate water depths for device operation, and the presence of a substrate suitable for anchoring deep-water wave energy devices. The grid connection sub-model evaluates the suitability of access based on the Euclidean distance to a substation, distance to shore, and the Euclidean distance to the closest transmission line, or kilovolt (KV) line. While connecting to a sub-station is not anticipated to be a necessity for most pre-commercial installations, it is a relevant factor for site expansion opportunity. The shore-side support sub-model evaluates the ability of existing shore-side resources to satisfy wave energy developers' needs for access to a deep water port for device installation, and access to a service port for intermittent wave energy device operations and maintenance.
Lineage:
Process Step:
Process Description:
The modeling uses a spatial multiple criteria decision analysis (MCDA) method. The goal of an MCDA is to identify the key parameters or variables that influence siting decisions for wave energy and combine spatially-explicit criteria to identify desirable areas for wave energy development. A geospatial information system (GIS) and a database with the MCDA parameters compute the spatial solutions based on input from users. The parameters are combined using a weighted product model with all parameters currently weighted equally. The parameters used to model coastal, mid-depth, and offshore wave energy device suitability include:
- Water depth
- Substrate type
- Distance from the nearest substation.
- Distance to shore.
- Distance to the nearest transmission cable.
- Distance to service port.
- Distance to deep water port (for device installation).
Process Step:
Process Description:
Different classes of wave energy devices require unique conditions to generate and transmit electricity. The wave
energy suitability models contained in this analysis include a range of wave energy device types:
- Offshore Point Absorbers: Where the water moves a float vertically.
- Offshore Oscillating Water Columns: Where the surge generated by waves within a chamber is used to
drive air through an above-surface turbine.
- Offshore Surge Devices: Where the pressure differential between two closely situated flaps is used.
- Offshore Attenuator/Pivots: Where the articulation of a joint around a pivot is converted into compressive
or rotational energy.
- Offshore Flywheel Devices: Where the motion induced by passing waves is transformed into rotational
energy that accelerates a flywheel or gyroscope.
- Offshore Pressure Devices: Seabed-based flexible reservoirs of air which become cyclically compressed
and expanded as a wave peak and trough pass over.
The suitability of a given area for a particular class of wave energy devices is determined based on the potential
sites presence or absence of criteria necessary for wave energy development and operation.
For each of these criteria, a set of suitability scores was developed based on existing information on wave energy
device types, interviews with inventor and developer representatives, and experiences from international
development. Specifically, scoring reflects known specifications or requirements for anchoring and operating
various wave energy devices. Preliminary scores were vetted with technology developers to validate assumptions,
confirm existing technology drivers, develop common suitability scores among devices with technological
similarities, and ensure that the relative suitability among wave energy devices was logical.
These scores range from zero to ten, with zero representing no potential for wave energy development and ten
representing that the conditions observed are favorable for wave energy development in an economically-constrained environment. Ten intervening classifications are then determined in one-unit increments. Zero values are reserved for cases where the parameter overrides all other values, thus eliminating development potential.
Process Step:
Process Description:
Coastal, mid-depth, and offshore wave energy device suitability was interpreted by identifying "natural breaks" in
the frequency distribution histogram of the model results. Histograms have long been used to evaluate data and
patterns. For this evaluation, a histogram was created for each technology class to illustrate the frequency of wave
energy device suitability score for each raster grid cell included in the study area. Thus, the histograms for each
technology class illustrate the general shape and spread of suitability model results.
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: G-polygon
Point and Vector Object Count: 1325
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: 1312335.958
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: OWET_offshore_feasibility
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: GRIDCODE
Attribute Definition: Code assigned in the Model effort
Attribute:
Attribute:
Attribute Label: LEGEND
Attribute Definition: Grid Code legend text explaining percent "most suitable" deep-water wave energy model results
Attribute:
Attribute Label: Shape
Attribute Definition: Feature geometry.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Coordinates defining the features.
Distribution Information
Section Index
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Oregon Coastal Management Program
Contact Person: Andy Lanier
Contact Address:
Address Type: mailing address
City: Salem
State or Province: OR
Contact Voice Telephone: 503-373-0050
Contact Electronic Mail Address: andy.lanier@state.or.us
Resource Description: Downloadable Data
Standard Order Process:
Digital Form:
Digital Transfer Information:
Custom Order Process: Requests to Access and use this data must be approved in writing by Oregon Wave Energy Trust.
Available Time Period:
Time Period Information:
Single Date/Time:
Calendar Date: 1/1/1895
Time of Day: Unknown
Metadata Reference Information
Section Index
Metadata Date: 5/3/2012
Metadata Review Date:
Metadata Future Review Date:
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Oregon Coastal Management Program
Contact Person: Tanya C. Haddad
Contact Position: Coastal Atlas Administrator
Contact Address:
Address Type: mailing and physical address
Address: 800 NE Oregon St
City: Portland
State or Province: OR
Postal Code: 97232
Country: USA
Contact Voice Telephone: 9716730962
Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
SMMS Metadata report generated 5/3/2012