Abstract
지진해일은 대표적인 자연재해 중 하나로 빠른 속도로 해안에 전파되어 심각한 인명 및 재산 피해를 초래한다. 또한, 지진해일은 큰 에너지를 가지고 있기 때문에 유사와 각종 부유물 등 많은 물질을 이동시켜 해안가 지형의 변형, 구조물의 피해 등을 발생시킨다. 따라서 지진해일에 의해 발생되는 유사이송을 예측하는 것은 범람으로 인한 피해지역 예측과 더불어 매우 중요하다. 본 연구에서는 지진해일에 의한 유사가 발생하는 영역을 소류사에 의해 구성되는 소류층과 부유사의 거동이 주가되는 부유층으로 분리하여 고려하는 방법으로 해저지형이 변화를 예측하는 수치모의를 수행하였다. Tsunami, one of the major natural disasters, is rapidly invaded the coastal communities resulting in significant casualties of human beings and property damage. In addition, because tsunamis may have a great amount of energy, they transport various floating debris and silt resulting a deformation of the coastline and a damage to structures. Therefore, predicting the sediment transport caused by tsunami is also important as much as expecting the inundated area due to flooding. In this study, a numerical simulation is carried out to predict the morphological change of the sea bed considering the domain, where sediment transport occurs, into two layers; bed load layer which is made up by bed load, and suspended load layer mainly composed by the movement of the suspended load.
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