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提出了一种新的离岸流观测方法.该方法利用超高频岸基雷达观测离岸流运动,并利用雷达电磁波与离岸流作用所产生的多普勒频偏,计算离岸流运动的频率特性,分析离岸流的速度、浪高、所在位置、持续时间.对近岸浪破碎潜在产生的离岸流进行了评估,弥补了传统利用海流计测量的不足.实验结果表明超高频岸基雷达可进行实时性观测离岸流,能够很好地预测天然海滩近岸流场.
A new method of offshore flow observation is proposed.The method uses the UHF shore-based radar to observe the offshore flow and uses the Doppler frequency offset generated by the electromagnetic wave of the radar and the offshore flow to calculate the offshore flow The frequency characteristics of the offshore flow were analyzed, and the velocity, wave height, location and duration of the offshore flow were analyzed.The potential offshore flow induced by the near shorewave was evaluated to make up for the shortcomings of the traditional use of the current meter.The experimental results show that ultra-high Coastal base-frequency radar can be observed in real-time offshore flow, can predict the natural beach nearshore flow field.