Housing in Thailand is expanding to the suburbs, especially for the lower classes, with more people living in collective housing. This study used a questionnaire survey to analyze the relationship between socioeconomic disparities in collective housing and disaster risk reduction (DRR) following the great flood of 2011. The results show that, although suburban lower-class collective housing was severely affected by the flood, DRR measures remain insufficient. The findings suggest that, in addition to supporting victims irrespective of residential status and aiding apartment managers in implementing DRR measures, lowering levels of inundation in the suburbs by “sharing” flood water with the more affluent city centers is an option that should be considered.

1. [1] A. Morita, D. Komori, and A. Kawasaki, “Interdisciplinary investigation on the Chao Phraya River Part 3: Preliminary analysis of the changes in Communities and the Irrigation System,” Seisan-kenkyu, Vol.65, No.4, pp. 491-496, 2013 (in Japanese).
2. [2] S. Haruyama, “Recent Changes of Flooding in the Central Plain of Thailand,” J. of Geography, Vol.100, No.2, pp. 284-297, 1991 (in Japanese).
3. [3] Colliers International Thailand, “Condominium market indicators Bangkok Condominium Market REPO,” Q4 2012, www.colliers.co.th [accessed May 11, 2018]
4. [4] Bangkok Post, “Fire safety: 82% of buildings ignore fire regulations,” 7 April 2017.
5. [5] Ministry of Internal Affairs, “Building control act,” 1979.
6. [6] D. Komori, S. Nakamura, M. Kiguchi, A. Nishijima, D. Yamazaki, S. Suzuki, A. Kawasaki, K. Oki, and T. Oki, “Characteristics of the 2011 Chao Phraya River flood in Central Thailand,” Hydrological Research Letters, Vol.6, pp. 41-46, 2012.
7. [7] H. Takebayashi, K. Toda, H. Nakagawa, and H. Zhang, “Field and Interview Surveys of the Flood of 2011, Thailand,” J. Disaster Res., Vol.8, No.3, pp. 386-396, doi: 10.20965/jdr.2013.p0386, 2013.
8. [8] M. Henry, A. Kawasaki, I. Takigawa, and K. Meguro, “The impact of income disparity on vulnerability and information collection: an analysis of the 2011 Thai flood,” J. of Flood Risk Management, Vol.10, No.3, doi: 10.1111/jfr3.12144, 2017.
9. [9] Y. Tahira and A. Kawasaki, “The Impact of the Thai Flood of 2011 on the Rural Poor Population Living on the Flood Plain,” J. Disaster Res., Vol.12, No.1, pp. 147-157, doi: 10.20965/jdr.2017.p0147, 2017.
10. [10] Y. Tahira and A. Kawasaki, “Relationship between a rural area and floods in Central Thailand: Why a ‘poor’ village and a ‘rich’ village share life on a flood plain?,” J. of Social Safety Science, Vol.29, pp. 269-278, 2016 (in Japanese).
11. [11] A. Garero and R. Muttarak, “Impacts of the 2010 Drought and Floods on Community Welfare in rural Thailand: Differential Effects of Village Educational Attainment,” Ecology and Society, Vol.18, No.4, Article No.27, 2013.
12. [12] T. Sararit and T. Kondo, “Housing Renovation After the 2011 Thailand Flood in Ayutthaya,” J. Disaster Res., Vol.9, No.4, pp. 563-569, doi: 10.20965/jdr.2014.p0563, 2014.
13. [13] Y. Iwaki, “Raised-Floor-House and Floods in Thailand,” J. of Architecture in Japan, Vol.127, No.1634, 2012 (in Japanese).
14. [14] A. Murata, “Changes and problems of preliminary measures to disasters: Changes of DRR in large-scale collective housing,” Urban Housing Sciences, Vol.88, pp. 21-24, 2015 (in Japanese).
15. [15] F. Bitou, A. Sakai, F. Tanaka, C. Kajiwara, M. Miyagawa, and H. Nakajima, “Study on the method of strengthening disaster prevention power by mutual assistance with a condominium association, the neighborhood association and others,” Policy Research Institute for Land, Infrastructure, Transport and Tourism Research Report, No.123, 2015 (in Japanese).
16. [16] T. Ichiko, “Making a resilient community (the third workshop), workshop for living home continuously in collective housing after disaster,” Bousai, Vol.69, No.402, pp. 17-20, 2015 (in Japanese).
17. [17] R. Kitajima, F. Seta, T. Kidokoro, and K. Katayama, “A Study on the Locational Preferences of Japanese Companies after Thailand Flood 2011: The Relationship with the Strategy for Reconstruction and Future Development by Thai Government,” J. of the City Planning Institute of Japan, Vol.48, No.3, 2013 (in Japanese).
18. [18] Y. Hagiwara, D. Kuribayashi, and H. Sawano, “Enhancement of Flood Countermeasures of Japanese-Affiliated Firms based on the Lessons Learned from the 2011 Thai Flood,” J. of Social Safety Science, Vol.27, pp. 237-244, 2015 (in Japanese).
19. [19] Y. Tamada et al. (Eds.), “Conflict and politics over flood, 2011 Thai flood– Records and Lessons,” pp. 123-160, Institute of Developing Economies, 2013 (in Japanese).
20. [20] K. Hoshikawa, “Chapter 1: Flood assault society unequally,” N. Maki and H. Yamamoto (Eds.), “Global Cooperation and Disaster Risk Reduction: Area Studies on Disaster Risk Management Series 3,” Kyoto University Press, pp. 17-50, 2015 (in Japanese).
21. [21] JICA, Japan Int. Development Center of Japan, Inc., Pacet Corporation, “Data collection survey on housing sector in Thailand,” 2013.
22. [22] M. Kawamori, “The 2011 Thailand Flood and Social Security,” The Review of Comparative Social Security Research, Vol.188, 2014 (in Japanese).
23. [23] National Statistical Office, Ministry of Information and Communication Technology, “Core Economic Indicators of Thailand 2012,” 2012.