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OAS accession Detail for 0037899
| << previous | |revision: 13 |
| accessions_id: | 0037899 | archive |
|---|---|
| Title: | West Maui (Hawaii) non-directional wave and tide data at three stations in depths less than 11 meters, October 2003-February 2004 (NODC Accession 0037899) |
| Abstract: | The U.S. Geological Survey Western Region Coastal and Marine Geology Team deployed the National Institute of Water and Atmospheric Research (New Zealand) three (NIWA) Dobie-A non-directional wave gauges in nearshore areas of western Maui during October 2003 - February 2004 in depths less than 11 m. It also provides tidal heights, although they are not linked to a shore-based datum. These data were collected to provide research-grade scientific baseline measurements and for nearshore circulation studies. Data are in ASCII format with included metadata as .doc and .txt files. |
| Date received: | 20071218 |
| Start date: | 20031021 |
| End date: | 20040204 |
| Seanames: | |
| West boundary: | -156.68 |
| East boundary: | -156.63 |
| North boundary: | 21.01 |
| South boundary: | 20.96 |
| Observation types: | |
| Instrument types: | |
| Datatypes: | |
| Submitter: | Storlazzi, Dr. Curt |
| Submitting institution: | US DOI; USGS; Western Region |
| Collecting institutions: | |
| Contributing projects: | |
| Platforms: | |
| Number of observations: | 3 |
| Supplementary information: | Data parameters: -DYD Decimal year day 2001; dates/times are local Hawaiian Standard Time (GMT-11:00). -h Water depth in meters, calculated as the mean water depth from each hourly 512 s time series record. -Hs - Significant wave height in meters; derived from the zeroth moment of the reported energy spectrum. Described as the 'average height of the one third highest waves in the record'. The US Army Corps of Engineers, Shore Protection Manual, 3-11, states that a useful estimate of significant wave height in deep water is defined as: Hs~4 x sigma, where sigma is the standard deviation of the wave record. Statistically, the maximum wave height in the record is Hmax ~ 9 x Hs/5. - Tp - Peak period, in seconds; inverse of the frequency with the highest energy in the reported spectrum. A NIWA Dobie-A non-directional wave gauge was used to acquire this dataset. The Dobie was used in Time Series mode and thus recorded a time series of pressure, which was converted to water depth assuming a water density and atmospheric pressure. Significant wave height (Hs) and dominant wave period (Td) were computed from these 512 s time series of water depth at 2 Hz using the US Army Corps of Engineers (1989) SUPERDUCK spectral method. The high-frequency and low-frequency cut-offs were 0.04 Hz/25 s and 0.25 Hz/4 s, respectively. |
| Availability date: | 20080103 |
| Metadata version: | 13 |
| Keydate: | 2008-01-03 12:51:05+00 |
| Editdate: | 2011-09-19 22:26:54+00 |