Jong-Gyu Han and Seong-Pil Kim, 2013. Spatial Zonation of Storm Surge Hazardous Area in the Nakdong Estuary of Korea using High Precision Terrain Data Acquired with Airborne LiDAR System and Geospatial Analysis.
In this study, we estimated hazardous area vulnerable to storm surge and also investigated the areal increases under sea level rise condition. For quantitative assessment together with geospatial analysis with GIS we used precise one-meter-gridded airborne LiDAR-based topographical models, the relative vertical accuracies of which fall within ca. 30 cm excluding outliers. According to the inundation prediction the storm surge hazardous area is predicted to range approximately from 6 to 20 km2 depending on the storm power. The result shows also that in the higher sea level condition in 2100 the areal extent could be increased by up to 68 %. Being noteworthy the areal increase was greater in the small-scale storms than in the large. The elevation models and cross-sectional profiles of the barrier islands protecting the Nakdong estuary were acquired for further assessment and discussion on their roles of natural underwater dykes. As larger inundation potential could be transferred into greater socioeconomic damages, the authors expect that precise quantitative estimation of vulnerability could be used for efficient and rational information for long-term coastal management planning.