Page 253 - Proceeding of Atrans Young Researcher's Forum 2019_Neat

“Transportation for A Better Life:
Smart Mobility for Now and Then”

23 August 2019, Bangkok, Thailand

Impact of Adaptation Measures for Disruption of Road Network
under Urban Floods in Developing Country
Identification number: AYRF2019-036
1
2
Noriyasu TSUMITA , Hiroki KIKUCHI , Atsushi FUKUDA
2

1 Program of Transportation Systems Engineering
Graduate School of Science and Technology, Nihon University
Telephone +81-47-469-5355, Fax. +81-47-469-5355
E-mail: csno18006@g.nihon-u.ac.jp

2 Department of Transportation System Engineering
College of Science and Technology, Nihon University
Telephone +81-47-469-5355, Fax. +81-47-469-5355
E-mail: kikuchi.hiroki@nihon-u.ac.jp or fukuda.atsushi@nihon-u.ac.jp

Abstract
In recent years, urban activities are deeply affected due to urban floods are occurred frequently.
Especially, it has been increasingly occurring in developing countries. In urban areas, the big issue has
become the floods which influence huge damages to urban transport such as loss of the connectivity on the
road network. In order to outcome this issue, many countries and cities try to implement adaptation policies
for the flood damages in urban areas. However, they are unable to uncover the impact of adaptation measures
on the urban transport. Therefore, in this study, the objective is to reveal the effects of the implementation
adaptation measure for road network disruptions. As the method, each road section compares to the traffic
volume of each link for understanding the priority the rank of implementation in countermeasures. Finally,
to assess the measure of the transport sector in mitigating urban flood impacts. As the results, it was found
that the measure of the elevation of arterial roads could shorten average travel time by 20 minutes during
flooding period in the zones along the river. This benefit was estimated at 6.8 million THB per 1.5 months
in the rainy season. In conclusion, this study suggested that it is essential to implement appropriate measure
on the transport sector for the alleviation of urban flood impacts, based on the disruptions of the road network.

Keywords: Road network disruption, Urban flood, Developing country, Ubon Ratchathani

1. Introduction However, it is thought that the decrease in
Recently, the floods frequently occur by travel speed and increase in travel distance will have
extreme weather and give significant damage to a significant impact due to road network disruptions
urban areas in developing countries. In the case of and road inundation considering urban activities.
Thailand, urban activities have badly damaged due Additionally, they have not been analyzed how the
to urban floods to increase precipitation from May to decrease in travel time and the increase in travel
October during the rainy season. In the urban flood distance due to the disruption of the road network
of 2011, the flood damages were extended to the affect urban activities.
whole of Bangkok Metropolitan Area. And then, Therefore, in this study, we understood the
they impacted not only the inundation of residents disruption of the road section from the inundation
and factories but also the disruption of road situation of the road network in Ubon Ratchathani,
networks. The damage cost was estimated at 1.43 which is a middle-sized city in Thailand. And then,
trillion THB, approximately. based on the priority, we simulated the
In the past, many studies have been analyzed urban implementation of the measure and evaluated the
flood occurrence, and the estimation of the damage effect of measure by using the indicators of the
caused by the urban floods have been regarded as average travel time and travel time reduction.
human damage, damage to buildings and facilities, Furthermore, it was estimated the monetary value of
and decrease in asset value. the impact of adaptation measures by cost-benefit
analysis.

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