Development and application of flood impact maps under climate change scenarios: A case study of the Yilan area of Taiwan

Flooding is the main disaster type in Taiwan and usually caused by typhoons heavy rainfall. To understand flood impacts increasing rainfall due to global warming, this study adopts a high-resolution atmospheric model (HiRAM) under representative concentration pathway (RCP) 8.5 scenario project future changes impact. For simulation, SOBEK was used determine maximum accumulated flooding depth probability two periods of present middle 21st century. Yilan County, one most flood-prone areas Taiwan, chosen as demonstration case for development impact maps. According results map application, flooded were predicted increase period century rainfall, especially paddy fields, maricultural farms, stock farms. From base century, area projected from 24% 40% 9% 15% less than 1% These show that maps can help elucidate actual climate change serve scientific basis adaptation actions.