2004 Indian Ocean tsunami flow velocity measurements from survivor videos
2004 Indian Ocean tsunami flow velocity measurements from survivor videos
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DOI：
10.1029/2006gl026784
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发表时间：
2006-12-19
影响因子：
5.2
通讯作者：
Yoo, Jeseon
中科院分区：
文献类型：
--
作者：
Fritz, Hermann M.;Borrero, Jose C.;Yoo, Jeseon
2004年12月26日的海啸严重影响了班达亚齐沿着苏门答腊北端（印度尼西亚），距离9.0级地震震中250公里。这次海啸流速分析的重点是两个幸存者的视频记录在班达亚齐超过3公里的开放的海洋。2005年2月22日至25日，调查小组重新访问了海啸目击者视频记录的确切位置，以记录相机校准地面控制点。确定了记录期间摄像机的运动。采用直接线性变换（DLT）对单个视频图像进行校正，假设水平面处于该水平。最后，基于互相关的粒子图像测速（PIV）分析被施加到整流的视频图像，以确定瞬时海啸流场。测得的海啸流速在2至5米/秒的范围内。
The tsunami of 26th December 2004 severely affected Banda Aceh along the North tip of Sumatra ( Indonesia) at a distance of 250 km from the epicenter of the magnitude 9.0 earthquake. This tsunami flow velocity analysis focused on two survivor videos recorded within Banda Aceh more than 3 km from the open ocean. The exact locations of the tsunami eyewitness video recordings were revisited by the survey team between February 22 and 25, 2005 to record camera calibration ground control points. The motion of the camera during the recordings was determined. The individual video images were rectified with a direct linear transformation (DLT) assuming a planar water surface at the level. Finally a cross-correlation based particle image velocimetry (PIV) analysis was applied to the rectified video images to determine instantaneous tsunami flow velocity fields. The measured tsunami flow velocities were within the range of 2 to 5 m/s.