1. Doctoral Researcher, School of Geography, Earth and Environmental Sciences, Univ. of Birmingham, Birmingham, West Midlands B15 2TT, U.K. (corresponding author).
2. Professor, School of Geography, Earth and Environmental Sciences, Univ. of Birmingham, Birmingham, West Midlands B15 2TT, U.K.
3. Professor, School of Civil Engineering, Univ. of Birmingham, Birmingham, West Midlands B15 2TT, U.K.
4. Ho Chi Minh City Univ. of Architecture, Ho Chi Minh City 70000, Vietnam.
5. Dept. of Urban Planning, Ho Chi Minh City Univ. of Architecture, Ho Chi Minh City 70000, Vietnam.