Description
Observational dataset from the Orcas Island Power and Light Coop. (OPALCO) tidal site in Rosario Strait, WA (USA). This project presents a resource characterization of the tidal currents at a proposed site for power generation in Rosario Strait, WA (USA). Acoustic Doppler Current Profilers (ADCPs) were deployed to measured tidal currents, turbulence, and surface waves at the site. The measurements followed established technical specifications (IEC 62600-201) and were informed by previous work at other tidal power sites in the region. The datasets provided include processed and raw data from Acoustic Doppler Current Profilers (ADCPs) deployed at three locations for 103 days. Also included is an estimate of turbulent intensity.
Stationary measurements of tidal currents were collected from 2 Oct 2024 to 13 Jan 2025 (total duration: 103 days). This duration is sufficient to determine at least 20 tidal constituents using classic tidal harmonic analysis, and it is also sufficient to determine a purely statistical description of the tidal currents.
The measurements used ADCPs on three different platforms: a Sea Spider seafloor tripod (SS), a stablemoor (STBM) subsurface mooring, and a surface buoy (SB) mooring. The sea spider tripod measurements alone are sufficient for resource characterization. The additional measurements were included for risk mitigation, spatial context, and informing future revisions to IEC 62600-201.
For more information on the project and methodology see the "Rosario Data Report Final" resource below.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| Harmonic Analysis.m | Unknown | Harmonic analysis of Sig250 data using T-tide. | Open resource |
| Nortek Matlab Raw.zip | ZIP | Raw ADCP data from all Norteks, in matlab formats. | Open resource |
| Rosario Data Report Final.pdf | Report and figures with ADCP analysis, QA/QC, resource characterization, AEP estimates, etc. | Open resource | |
| Rosario Sea Spider Analysis.m | Unknown | Processing script for Sig250 on Sea Spider tripod. | Open resource |
| Rosario Stablemoor Analysis.m | Unknown | Processing script for Sig500s on Stablemoor mooring, including merger of up- and down-looking observations. | Open resource |
| Rosario Surface Buoy Analysis.m | Unknown | Script to processing Aduadopp data from Surface Buoy, including estimate of horizontal speed from only 2 beams (b/c 3rd beam contaminated). | Open resource |
| Sea Spider Sig 250.mat | MAT | Processed data from uploading Nortek Signature 250 on Sea Spider seafloor tripod. | Open resource |
| STBM Sig 500.mat | MAT | Processed data from up- and down-looking Nortek Signature 500 profilers on Stablemoor mooring. | Open resource |
| Surface Buoy AQD.mat | MAT | Processed data from downlooking Nortek Aquadopp on Surface Buoy. | Open resource |