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

在通常的冲浪区观测中，采用了固定在定点的测量装置，提供了水动力项目的准确时间记录。然而，这些仪器的部署在大多数野外实验中都是有限的，这限制了对冲浪区动力学的空间理解。在此背景下，使用了X波段雷达系统和系泊视频系统来获取冲浪区的空间数据。现场实验是在日本Hasaki的一个研究码头Hors进行的。同时进行视频和雷达记录，以检查雷达回波的特性。雷达进行了频繁的观测，包括几次风暴事件。雷达记录的结果显示了该系统的潜力，表明该系统能够捕获单个波浪的启动高度、岸线位置的近岸分布和潮间带前滨斜坡。对爬升位置随时间变化的分析表明，存在沿岸边波的传播。瞬时雷达回波数据的PIV分析显示了由波的局部相速度反演波的折射模式和深度

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