[A-HW37] Interdisciplinary approach to support climate change adaptation measures in regional scale

[AHW37-08] Analysis for impacts of urban flood on traffic flow in Bangkok

*Shinichiro NAKAMURA¹, Napaporn Piamsa-nga², Sanit Wongsa³, Varameth Vichiensan² (1.Nagoya University, 2.Kasetsart University, 3.King Mongkut's University of Technology Thonburi)

Keywords:Urban flood, Traffic, Bangkok

Traffic is an important economic and social activities in urban area, and its congestion tends to be a bottleneck for their activities and economic developments, especially in developing countries. Heavy rainfall and urban flood are factors which generate or enhance the traffic congestions in urban area. Bangkok, our target city, has been under a rapid economic growth in last decades and the traffic congestion have been one of important and urgent social issue through the increasing population and economic activities. In addition, it’s expected that climate change will increase heavy rainfall in Thailand and the insufficient drainage system may heighten the flood damages via traffic congestion. Under the circumstances, an evaluation for damages of heavy rainfall on the economic activities and for effectiveness of adaptation measures are urgently required.

This study aims to analyze the impacts of urban flood on the traffic flow in Bangkok with connecting an urban flood model (iRIC) and a traffic model (traffic assignment user's equilibrium model (TRANSCAD)) . In addition, we evaluated the effectiveness of adaptation measures to reduce the impacts of urban flood on traffic by applying the connected model to several adaptation scenarios. The results show that several main roads in Bangkok are under vulnerable situations for urban floods and installing additional pumping stations will dramatically reduce the traffic congestion in several main roads.