Spatial variability of wave fields over the scale of a wave energy test site

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Spatial variability of wave fields over the scale of a wave energy test site

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dc.contributor.author Ashton, Ian Gerard en_US
dc.date.accessioned 2012-03-21T13:41:04Z en_US
dc.date.accessioned 2013-03-21T10:11:31Z
dc.date.issued 2011-07-29 en_US
dc.description.abstract Accurate wave measurements are required for wave energy applications, including resource assessments and performance assessments. In response, wave data are measured from deployment sites, commonly using wave buoys or other point wave sensors. Spatial variability in the wave field will introduce inaccuracies to the analysis of data captured from a single point to represent a separate location or area. This thesis describes research undertaken to quantify the effect of spatial variability on the accuracy of direct wave measurements taken at a wave energy site. An array of four timesynchronised wave buoys were deployed, separated by 500m, in a location close to the Wave Hub wave energy test site in Cornwall, UK. These data were subject to close scrutiny in terms of data processing and quality control, which raised specific issues regarding data processing and the validation of wave data for a new measurement facility. Specific recommendations are made for data captured from this facility, and bespoke quality control routines were developed. This process minimises the possible contribution of errors to the processed data, which is observed to be of the highest importance when analysing simultaneous data sets, and provides a data set that is particularly suited to the examination of the spatial characteristics of ocean waves. The differences between simultaneous data demonstrated local physical processes to be causing a deterministic difference between the waves at the measurement sites, which contributed to a significant difference between the power statistics at different locations within the site. Instantaneous differences between measurements were observed to agree well with theoretical estimations of random error, based on sampling theory. The culmination of the research is a unique analysis of the spatial properties of ocean wave fields on the scale of a wave energy test site, of direct relevance to the development and monitoring of wave energy test sites. en_GB
dc.description.sponsorship SWRDA and ERDF through the PRIMaRE project en_GB
dc.identifier.uri http://hdl.handle.net/10036/3471 en_US
dc.language.iso en en_GB
dc.publisher University of Exeter en_GB
dc.rights This thesis is available for Library use on the understanding that it is copyright material and that no quotation from the thesis may be published without proper acknowledgement. en_GB
dc.subject wave energy en_GB
dc.subject ocean waves en_GB
dc.subject wave analysis en_GB
dc.subject wave measurement en_GB
dc.subject resource assessment en_GB
dc.subject performance assessment en_GB
dc.subject spatial variability en_GB
dc.title Spatial variability of wave fields over the scale of a wave energy test site en_GB
dc.type Thesis or dissertation en_GB
dc.date.available 2012-03-21T13:41:04Z en_US
dc.date.available 2013-03-21T10:11:31Z
dc.contributor.advisor Smith, George en_US
dc.publisher.department Camborne School of Mines en_GB
dc.type.degreetitle PhD in Earth Resources en_GB
dc.type.qualificationlevel Doctoral en_GB
dc.type.qualificationname PhD en_GB


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