사면침식으로 인한 독도의 지형형성과 지형의 형태적 특성으로 살펴 본 사면안정성

Abstract

The goals of studies are finding the evidence of landform change, classifying landform by geograpical features, and finally analyzing stability of hillslope of the Dokdo volcano. In these studies, the 3-D topography maps of the Dokdo were made using bathmetry around the Dokdo and DEM data of the subaerial portion of the Dokdo. The stability of hillslope of the Dokdo was estimated by analyses of morphological elements such as altitude, slope and slope aspect. In submerged part of the Dokdo, the erosion landforms formed by mass-movement and channels were confirmed in slope of 14~40. The debris flows formed a irregular salient at slope or were piled up with 5~15 gradients at bottom of the Dokdo. About 70% of suberial slope of the Dokdo are steep with high gradient of more than 40. There are the debris collapsed from the slopes from the costal area to -30~-40 m in water depth. The north and east slopes of Seo-do and the west slopes of Dong-do in the Dokdo, expect wave cut platform and low gradient slope, are unstable with a possibility of slump or mass-movement. The areas of weak structure in the Dokdo have the possibilities of corrosions and collapses by wave cuts, typhoons, tidal waves.