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http://dx.doi.org/10.11108/kagis.2020.23.1.015

Application of Flood Prevention Measures Using Detailed Topographic Data of River and Lowland  

LEE, Jae-Yeong (Dept. of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology)
HAN, Kun-Yeun (School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University)
KEUM, Ho-Jun (Disaster Prevention Research Division, National Disaster Management Research Institute)
KO, Hyun-Soo (Dept. of Civil and Environmental Engineering, Ulsan University)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.23, no.1, 2020 , pp. 15-29 More about this Journal
Abstract
Recently, the incidence of flooding in Korea has decreased by the measures by central and local governments, however the scale of damage is increasing due to the improvement of living standard. One of the causes of such flood damage is natural causes such as rainfall exceeding the planned frequency of flood control under climate change. In addition, there are artificial causes such as encroachment of river spaces and management problems in upstream basins without consideration of downstream damage potential by regional development flood. In this study, in order to reduce the inundation damage caused by flooding of river, the situation at the time of inundation damage was reproduced by the detailed topographic data and 2D numerical model. Therefore, the effect of preparing various disaster prevention measures for the lowland was simulated in advance so that quantitative evaluation could be achieved. The target area is Taehwa river basin, where flooding was caused by the flooding of river waters caused by typhoon Chaba in October 2016. As a result of rainfall-discharge and two-dimensional analysis, the simulation results agree with the observed in terms of flood depth, flood arrival time and flooded area. This study examined the applicability of hydraulic analysis on river using two-dimensional inundation model, by applying detailed topographic data and it is expected to contribute to establish of disaster prevention measures.
Keywords
Flood Inundation; 2D Inundation Analysis; Typhoon Chaba; Detailed Topographic Data;
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