Kinematics of breaking tsunami wavefronts: A data set from large scale laboratory experiments.
Kinematics of breaking tsunami wavefronts: A data set from large scale laboratory experiments.
复制标题
破坏海啸波前的运动学：来自大规模实验室实验的数据集。
DOI：
10.1016/j.coastaleng.2008.10.011
复制
发表时间：
2009
影响因子：
4.4
通讯作者：
L. Fayler
中科院分区：
文献类型：
--
作者：
T. Baldock;D. Cox;T. Maddux;J. Killian;L. Fayler
本文概述了一个新的大规模实验室数据集，该数据集是关于破碎的海啸波阵面的运动学。这些实验的目的是提供一个开放获取的数据集，用于模型测试、校准和验证，特别强调波浪破碎和助跑(SWASH)区的流体运动学。这些实验是在俄勒冈州立大学O.H.欣斯代尔波浪研究实验室的海啸波盆地的一个复合斜坡上进行的。收集了10种不同波浪条件下的数据，包括不破碎波和破碎波，以及岸边破裂和充分发育的长钻孔。使用紧密排列的表面穿透波计、非接触式超声波测速仪和四个三维侧视声学多普勒测速仪测量表面高度和流体运动学。该阵列从近岸(深度=0.2米)遍历到中上部引水区，提供了30个跨岸位置的运动学数据。4个摄像机也拍摄了视频，覆盖了传播、断裂和助跑区域。海面高度、水流速度和造波者位移也被记录下来，以提供近海边界条件。这些实验包括波高可达0.55米，名义波周期可达20米，S在1/30坡度上的助跑长度可达15.2m。就浅水区和破碎区的坡度而言，数据对应于0.26-5.6范围内的艾瑞布伦数。原始数据、校准数据和处理数据以开放方式存储在俄亥俄州立大学海啸波盆地实验笔记本中，该笔记本提供对所有造波机控制信号、数据、仪器坐标以及处理和绘图软件的完全访问。本文介绍了该数据集，展示了数据质量，并初步分析了控制海啸事件影响的一些关键参数，包括助推与近岸波浪条件和近岸钻孔高度，原始岸线位置的最大淹没深度，以及达到最大淹没深度和水流逆转的时间。文中还给出了时间和对流加速以及湍流分量的例子，以进一步说明运动学的细节。
This paper provides an overview of a new large scale laboratory data set on the kinematics of breaking tsunami wavefronts. The aim of the experiments was to provide an open access data set for model testing, calibration and verification, with particular emphasis on fluid kinematics in the wave breaking and run-up (swash) zones. The experiments were performed over a composite slope in the tsunami wave basin at the O. H. Hinsdale Wave Research Laboratory at Oregon State University. Data for ten different wave conditions were collected, including non-breaking and breaking waves, and both shore breaks and fully developed long bores. Surface elevation and fluid kinematics were measured with a closely spaced array of surface piercing wave gauges, non-contact ultrasonic wave gauges and four 3-D side-looking Acoustic Doppler Velocimeters. The array was traversed from the nearshore (depth=0.2 m) to the middle and upper run-up zone, providing kinematic data at 30 cross-shore locations. Video was also recorded from 4 cameras covering the propagation, breaking and run-up zones. Surface elevation, flow velocities and the wave maker displacement were also recorded to provide offshore boundary conditions. The experiments include conditions with wave heights up to 0.55 m, notional wave periods up to 20 s and run-up lengths of up to 15.2 m on a 1/30 slope. In terms of the slope in the shoaling and breaker zones, the data correspond to Iribarren numbers in the range of 0.26–5.6. Raw, calibrated and processed data are stored with open access within the OSU Tsunami Wave Basin Experiment Notebook, which provides full access to all the wave maker control signals, data, instrument coordinates, and processing and plotting software. This paper serves as an introduction to the data set, demonstrates data quality and provides an initial analysis of some key parameters that govern the impact of tsunami events, including run-up versus offshore wave conditions and nearshore bore height, the maximum inundation depths at the original shoreline position, and the time to maximum inundation depth and flow reversal. Examples of temporal and convective accelerations and turbulent flow components are also presented to illustrate further details of the kinematics.