Using structural measures to reduce flood losses in a future extreme weather event

Hsiao Ping Wei*, Hsin Chi Li, Keh-Chia Yeh, Jun Jih Liou, Yung Ming Chen, Hsuan Ju Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Climate change is a real threat that brings heavier and more frequent extreme weather events. Many researchers have found that climate change will increase the risk of flooding around the world. The SOBEK inundation model and Taiwan Typhoon Loss Assessment System (TLAS) are used in this study to see if embankment and flood storage control measures can mitigate the impact (loss) of extreme events under climate change. Based on the simulation results, three inundation cases are simulated starting about 18 hr after the embankment is breached. When embankment and detention pond measures are not in place (Case A), the average flood depth in the catchment area caused by the TOP event is roughly 1.45 m. When adaptation measures such as [Case B raising embankments (Case B) and] are in place, the flood depth decreased by 39 and 33%, respectively. TLAS was used to evaluate the potential losses associated with the three cases (Case A, B, and C). When we add flood-control measures, the total loss reduced by adaptation measures for future extreme events in the Zhengwen River basin was NT$7 billion. This study provides applicable coping strategies for future extreme precipitation events that will effectively reduce the impact of extreme storm events.

Original languageEnglish
Pages (from-to)757-767
Number of pages11
JournalTerrestrial, Atmospheric and Oceanic Sciences
Issue number5
StatePublished - 1 Oct 2016


  • Climate change
  • Flood control measures
  • Flood disaster
  • TLAS

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