Analysis of Flood Inundated Area using Hydrological Model and Radarsat SAR Imagery

A flood resulting from climate changes recently has brought about tremendous damage to the people and property. For restoration and to establish the countermeasure, various investigations into the flood-inundated area have been underway. Among the investigation measures commonly adopted in South Korea are on-site survey and indirect investigation using flood outflow model. However, with such methods, it´s difficult to obtain a quick outcome as well as require verification for reliability. SAR that provides data irrespective of weather conditions and enables to perform rapid and precise investigation has been used since 1990s for flood monitoring. This study as basic research in preparation for launching KOMPSAT-5 in 2010 to use SAR sensor for water resources development is intended to compare the existing method to identify flood inundated area with that using SAR image, and measures to make use of SAR image.