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首页> 外文期刊>Journal of Waterway, Port, Coastal and Ocean Engineering >Wave Pressure Gauge Analysis with Current
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Wave Pressure Gauge Analysis with Current

机译：波压计与电流分析

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摘要

Bottom-mounted pressure gauges are used to measure waves in coastal inlets, where tidal currents are significant. Theoretically, neglect of the current in analysis of pressure data can lead to order-one errors in wave height estimates. Wave height is overestimated by neglecting flood current and underestimated by neglecting ebb current. A collocated wave buoy and bottom-mounted pressure gauge were deployed at Willapa Bay, Washington, to evaluate the significance of including current in pressure data analysis. Wave heights were overestimated by up to 20 percent if current was neglected. Larger current-induced errors in wave height were prevented by truncation of high-frequency energy to exclude pressure system noise. Truncation of the spectra leads to overestimates of mean wave period and underestimates of wave height. Adding a theoretical tail to the spectra reduces truncation errors. If current measurements are not available for pressure gauge analysis, reasonable results can be achieved by applying a conservative high-frequency cutoff and adding a theoretical tail.
机译：底部安装的压力表用于测量潮汐流较大的沿海入口处的波浪。从理论上讲，在分析压力数据时忽略电流会导致波高估计中的一级误差。忽略洪水流会高估波高，而忽略退潮会低估波高。在华盛顿州威拉帕湾部署了一个并置的波浪浮标和底部安装的压力表，以评估在压力数据分析中包括电流的重要性。如果忽略电流，波高被高估了20%。通过截断高频能量以排除压力系统噪声，可以防止波高中较大的电流感应误差。光谱的截断导致对平均波周期的高估和对波高的低估。在光谱中添加理论尾部可减少截断误差。如果电流测量不可用于压力表分析，则可以通过应用保守的高频截止值并添加理论尾部来获得合理的结果。

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