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Infrastructure Resilience Conference 2018

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Assessing and Modelling Urban Growth Coupled with Road Infrastructure for Southeast Asian Cities: Towards a Resilient Framework

Cities are complex systems. As cities evolve over time so does its infrastructure. Critical infrastructures such as power and road networks account for about 75 percent of infrastructure value, and therefore form vital component for the socio-economic development of a nation. Further, as cities grow, their infrastructure systems tend to become more complex and more vulnerable to various disturbances including natural disasters. In most developing countries, rapid urbanization also affects the performance of infrastructure systems via rapid increase in demand for energy, road and water infrastructures. Southeast Asia in particular has been going through a rapid rate of urbanization, with the proportion of urban population increasing from 32% in the year 1990 to 47% in 2014, and is projected to reach 56% by the year 2030. Therefore it is important to characterize the urban growth dynamics in order to design improved and sustainable urban planning methodologies, and assist policymakers in formulating effective policies for resilient cities. The study here analysed urban growth dynamics using remotely sensed (e.g. night-time lights, LANDSAT-TM) data to assess the spatio-temporal patterns in urbanization in major Southeast Asian cities. Specifically, the rate of urbanization is analysed and further examined to identify linkages with socio-economic indicators such as population. The study further analysed high-resolution gridded data and latest road network maps (Open Street Maps) to understand intra-urban spatial growth patterns and identify linkages between urban built-up area and road network density. The results from this study represent a step towards better understanding of the city’s road network infrastructure in tandem to its urbanization level. Hence, these relationships can better reflect on the city’s growth as coupled with its infrastructure to better plan development and management strategies for resiliency and sustainability.

Shankar Acharya Kamarajugedda
Institute of Catastrophe Risk Management, Nanyang Technological University
Singapore

Pradeep Mandapaka
Institute of Catastrophe Risk Management, Nanyang Technological University
Singapore

Edmond Lo Yat-Man
Institute of Catastrophe Risk Management, Nanyang Technological University
Singapore

 

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