MEASUREMENT OF SURFACE WAVES FROM SUBSURFACE GAGE
MEASUREMENT OF SURFACE WAVES FROM SUBSURFACE GAGE
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使用地下测量仪测量表面波
DOI：
10.9753/icce.v19.19
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发表时间：
1984
影响因子：
3
通讯作者：
Hsiang Wang
中科院分区：
文献类型：
--
作者：
Dong;Hsiang Wang
使用潜压计测量波浪具有许多优点，特别是在沿海沃茨。然而，存在与表面波的间接测量相关联的一些缺点。本文讨论了从地下压力测量中恢复面波的问题。研究了两个问题：从地下压力信号中更精确地恢复面波，以及从压力记录中简单地恢复面波的真实的时间。常用的线性变换从地下压力到表面高程进行评估，并检查可能的误差来源。结果表明，在中等水深时，非线性的影响和海流的影响较小。对于非线性和海流的影响不可忽略的浅水情况，给出了一种从压力和海流测量的组合中正确恢复表面波的方法。本文提出了一种从地下记录中恢复时间序列面波的简单方法，该方法利用微处理机可快速、近实时地从压力测量中恢复面波。
Wave measurement using subsurface pressure gage has many advantages, especially in coastal waters. However, there are some disadvantages associated with indirect measurement of surface waves. This paper deals with the problems in the recovery of surface waves from the subsurface pressure measurement. Two problems are examined: more exact recovery of the surface waves from subsurface pressure signal and a simple real time recovery of surface waves from the pressure record. The commonly used linear transformation from the subsurface pressure to surface elevation is evaluated and possible sources of error are examined. The effect of nonlinearity and effect of current are shown to be small in the intermediate water depth. For the case of shallow water where effects of nonlinearity and current are not negligible, a method of proper recovery of surface waves from the combination of pressure and current measurements is given. A simple method to recover the time series surface waves from subsurface record is proposed which enables speedy near real-time recovery of surface waves from pressure measurement using a microprocessor.