Spatial variability of ocean waves, from in-situ measurements
Spatial variability of ocean waves, from in-situ measurements
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DOI：
10.1016/j.oceaneng.2012.08.010
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发表时间：
2013-01-01
影响因子：
5
通讯作者：
Smith, G. H.
中科院分区：
文献类型：
--
作者：
Ashton, I. G. C.;Saulnier, J-B.;Smith, G. H.
本文描述了利用安装在英国凯尔特海一个侧面500米的方形编队中的四个方向波浮标阵列的测量结果来分析海浪的空间特性。这一地区的波浪测量已经安装，以支持在北康沃尔海岸外的波浪枢纽地点进行资源评估和波浪能装置的设计。这种多个方向传感器的独特部署提供了对波场空间特性的高质量直接测量。对阵列内所有四个浮标同时测量的光谱参数进行了比较，结果表明，不能认为整个测量区域的波浪条件是平稳的。测量的波场的差异主要是在低频率观察到的，并且观察到的水平足以影响对场地特征的评估。折射和底部摩擦的理论估计表明，这些物理过程对观测到的测量结果有贡献。结果表明，波场的空间变异性对波能位置的监测具有潜在的影响，并突出了对物理过程进行准确评估的要求。(C)2012爱思唯尔有限公司。保留所有权利。
This paper describes the analysis of the spatial properties of ocean waves using measurements from an array of four directional wave buoys installed in a square formation, with side 500 m, in the Celtic Sea, UK. Wave measurements in this area have been installed to support resource assessment and design for wave energy devices at the Wave Hub site off the North Cornwall coast. This unique deployment of multiple directional sensors provides high quality direct measurements of the spatial properties of the wave field. Spectral parameters measured simultaneously by all four buoys within the array are compared and it is demonstrated that wave conditions cannot be considered stationary across the measurement area. Differences in the measured wave fields were observed primarily in the low frequencies and are observed to be of a level sufficient to impact the assessment of site characteristics. Theoretical estimations of refraction and bottom friction indicate that these physical processes contribute to the observed measurements. The results demonstrate the potential effect of spatial variability in wave fields on the monitoring of wave energy sites, and highlight the requirement for accurate evaluation of physical processes. (C) 2012 Elsevier Ltd. All rights reserved.