Analysis of the Impact of Road Network Disruption on Travel Time During Flood Disaster in the Democratic Republic of Timor-Leste

In the Democratic Republic of Timor-Leste, rainfall during the rainy season has been increasing in recent years due to the effect of climate change. As a result, flood damage has occurred such as flood of houses and road collapse. In April 2021, Cyclone Seroja caused small and medium size rivers to overflow, and the capital city of Dili was flooded. Flooded roads caused the road network to be cut off, restricting movement within the Dili. Although the same level of disaster is expected in the future, no analysis has been conducted on the time required for evacuation and getting to hospitals in the event of flood. In this study, a network analysis was conducted to determine the degree of delay in time to major facilities such as airports and hospitals in the city. We assumed a flooding damage equivalent to the heavy rainfall in 2021, and that the road traffic network was blocked. Through the analysis of this study, it is clear that the delay time to destination varies depending on the density of the road in Dili.