Surf zone observations with X-band radar system and moored video system

在通常的碎波带观测中，采用定点测量装置，提供水动力项目的精确时间记录。然而，在大多数野外实验中，仪器的部署是有限的，这限制了对碎波带动力学的空间理解。在这种情况下，X波段雷达系统和系泊视频系统被用来获得碎浪带的空间数据。田间试验在HORS进行，这是一个位于日本Hasaki的研究码头。同时进行了录像和雷达记录，以检查雷达回波的特性。雷达经常进行观测，包括几次风暴事件。雷达记录的结果显示该系统的潜力，显示该系统能够捕捉到个别波浪的爬高高度，海岸线位置和潮间带前滨斜坡的沿岸分布。通过对波浪爬高位置随时间变化的分析，揭示了边缘波向沿岸传播的存在。瞬时雷达回波数据的PIV分析显示了从波的局部相速度反演的折射模式和深度

Measuring devices that are fixed to definite points are employed in the usual surf zone observations, which provide accurate time records of hydrodynamic items. The deployment of the instruments, however, is limited in most field experiments, which restricts the spatial understanding of the surf zone dynamics. In this context, a X-band radar system and moored video system are employed to obtain spatial data of the surf zone. Field experiments were conducted at HORS, a research pier located in Hasaki, Japan. Video and radar recording were conducted simultaneously to check the properties of radar echos. Frequent observations including several storm events were done with the radar. Results of the radar records demonstrated the potential of the system showing that the system is able to capture the run-up height of individual waves, longshore distributions of shoreline positions and inter-tidal foreshore slopes. Analyses of temporal variation of run-up positions revealed the existence of longshore propagation of edge wave. PIV analyses of instantaneous radar echo data showed the refraction pattern and depths inverted from local phase speeds of the waves