HR: 0800h
AN: T51A-0298    [Abstracts]
TI: The morphological changes after hillslope erosion and the stability of hillslope in the Dokdo
AU: * Kang, J
EM: kjhb612@hotmail.com
AF: Ewha Womans University, Ehwa Women's Univ., Daehyeon-dong, Seodaemun-gu, Seoul, Korea, Seoul, 120-750, Korea, Republic of
AU: Sung, H
EM: hhsung@ewha.ac.kr
AF: Ewha Womans University, Ehwa Women's Univ., Daehyeon-dong, Seodaemun-gu, Seoul, Korea, Seoul, 120-750, Korea, Republic of
AU: Kim, C
EM: kimch@kordi.re.kr
AF: Korea Ocean Research & Development Institute, Korea Ocean Research Institute, Sa 2- dong, Sangrok-gu ,Ansan-si, Gyeonggi-do, Korea, Ansan-si, 426-744, Korea, Republic of
AU: Park, C
EM: chpark@kordi.re.kr
AF: Korea Ocean Research & Development Institute, Korea Ocean Research Institute, Sa 2- dong, Sangrok-gu ,Ansan-si, Gyeonggi-do, Korea, Ansan-si, 426-744, Korea, Republic of
AU: Jeong, E
EM: eyjeong@kordi.re.kr
AF: Korea Ocean Research & Development Institute, Korea Ocean Research Institute, Sa 2- dong, Sangrok-gu ,Ansan-si, Gyeonggi-do, Korea, Ansan-si, 426-744, Korea, Republic of
AB: The goals of studies are finding the evidence of landform change, classifying landform by geographical features, and finally analyzing stability of hillslope of the Dokdo volcano. In these studies, the 3-D topographic maps of the Dokdo were made using bathymetry 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-movements and channels were confirmed in slopes of 14~ 40°. The debris flows formed a irregular salient at slopes or were piled up with 5~ 15° gradients at bottom of the Dokdo. About 70% of subaerial slopes 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, except 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.
DE: 0930 Oceanic structures
DE: 1130 Geomorphological geochronology
DE: 1744 Tectonophysics
DE: 3045 Seafloor morphology, geology, and geophysics
SC: Tectonophysics [T]
MN: 2007 Fall Meeting