Study on Coastal Erosion Signs Through Landscape Survey Applying Unmanned Aerial Vehicle (UAV) Aerial Photography — A Case Study on Coastal Settlements in Hualien, East Taiwan

2. Disasters Prevent Center, National Dong Hwa University College of Environmental Studies, Taiwan

Abstract: Under the combined effects of sea level rise due to global climate change, increased intensity and frequency of rainfall patterns in the context of extreme climate, as well as human efforts in coastal development, protection, and other factors, in this study, for the purpose of establishing a comprehensive costal erosion sign evaluation model, the current landscape conditions of several settlements on the east coast of Taiwan have been acquired one by one through UAV side photography, ortho-rectification, and establishing a digital terrain model, for interpretation of the indices of erosion signs and evaluation of disaster inducing risks in coastal settlements. The research results show that collecting landscape data in a quick, comprehensive, and effective manner by applying UAV could be helpful for identifying accident inducing risks in coastal settlements, in order to collect information about highly sensitive, fragile, and unstable coastal areas, which would have important influence and provide an administrative basis for overall coastal policies.