Abstract
Recently, urban flood damage has rapidly increased due to climate change, rapid urbanization, and frequent guerrilla heavy rains. Therefore, a quantitative flood damage analysis technique is required for effective policy regarding flooding in urban areas. In this study, the flood vulnerability and potential flood damage (PFD) methods, which are representative methods for analyzing the degree of flood damage in urban areas, were applied. In addition, the results of each analysis method were compared and analyzed using the flood prevention capacity-damage (PCD) matrix technique, which intuitively shows that even if many existing flood protection facilities are built, flood damage can be large when there is insufficient management or heavy rainfall exceeding the design rainfall occurs. The two existing flood damage techniques estimated Seocho-gu to have low flood vulnerability due to high financial independence and many flood damage protection facilities. However, application of the PCD matrix resulted in classifying Seocho-gu as highly vulnerable to flooding. These conflicting results thus demonstrate that a more detailed review and analysis are necessary when establishing a flood protection policy.
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