Tsunami Inundation Area and Run-up Height in the Iwate Coastal Region Following the Great East Japan Earthquake as Estimated from Aerial Photographs and Digital Elevation Data
Tsunami Inundation Area and Run-up Height in the Iwate Coastal Region Following the Great East Japan Earthquake as Estimated from Aerial Photographs and Digital Elevation Data
复制标题
根据航空照片和数字高程数据推算东日本大地震后岩手沿海地区的海啸淹没面积和上升高度
DOI：
10.1007/s11069-016-2285-1
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Shuzo Koshino
中科院分区：
文献类型：
--
作者：
Ryoichi Yanagawa;Shuzo Koshino
2011年3月11日的东日本大地震引发了一场强大的海啸，袭击了沿海地区，造成了死亡和广泛的破坏。这一事件促使进行了许多调查，以评估海啸对沿着和邻近地区的破坏和影响程度。在本文中，我们使用航空摄影和数字高程模型来评估海啸沿着岩手县海岸的淹没范围和上升高度。首先，利用观测到的海啸最远到达内陆的边界线来计算海啸影响地区的大小。然后，确定沿着迹线各点的海拔高度。由于地形和坡度沿着海岸线从平坦到非常陡峭的变化，这需要各种方法。我们的调查结果表明，航空摄影可以成功地用于对海啸的影响范围和相关损害进行广泛的近似评估，从而避免了立即进行现场视察的需要。此外，我们的结果表明，2011年海啸的上升高度可能超过40米，在沿着岩手海岸分散的地方。
The Great East Japan Earthquake of 11 March 2011 unleashed a powerful tsunami that struck the coastal region and left death and extensive destruction in its wake. This event prompted many investigations to assess the damage and the extent to which the tsunami affected areas along and adjacent to the coast. In this paper, we use aerial photography and a digital elevation model to assess the inundation extent and run-up height of the tsunami along the coast of Iwate prefecture. First, the size of the area affected by the tsunami was calculated by using the observed borderline trace of its farthest reach inland. Then, elevations above sea level were determined for various points along the trace. This required a variety of approaches because of the variation in the topography and gradient of the slope along the coastline from flat to very steep. The results of our investigation showed that aerial photography can be used successfully to obtain a broad approximate assessment of the reach of a tsunami and associated damage, thereby avoiding the need for immediate on-site inspections. Furthermore, our results suggested that the tsunami run-up height in 2011 could have reached more than 40 m at places scattered along the Iwate coast.