Analysis of Drainage Capacity and Flood Risk Areas for Integrated Urban Planning of Sam Khok District, Pathumthani Province

Main Article Content

Haruetai Moskong
Chatchai Jothityangkoon


After flood crisis in Thailand in 2011, Department of public works and town planning improved the regulation for urban planning to include flood protection plan in the urban planning. The aim of this paper is to present an analysis of the drainage capacity and flood-risk areas for integrated urban planning of Sam Khok district, Pathum Thani province. The main cause of flooding in this area is overbank from Chao Phraya River. The topography, climate, hydrological and historical flood data of study areas are collected for analysis. Rational method is used to analyze drainage capacity of 12 main canals from total 87 canals by using design rainfall with 5 years return period from Don Muang station. The results show that the drainage capacity of 4 canals (Koi Mai, Bang Pho Neor, Khok Ta Kraw and Khu) are not enough. Flood risk index is calculated to draw flood risk map representing 5 risk levels. The result shows that flood risk in the west of Sam Khok is very high, while flood risk in the southeast of Sam Khok is low. Combined results of flood risk analysis and drainage capacity of main canal are used to define canal plan with 4 sizes: 10, 20, 30 and 40 meter and space area for flood drainage in integrated urban planning of Sam Khok district.


Download data is not yet available.

Article Details



Bandhitchat, N. (2014). Requirements platform for urban planning. August, 21-22. Bangkok: Department of Public Works and Town & Country Planning.

Chow, V. T., Maidment, D. R. & Mays, L. W. (1988). Applied hydrology. McGraw-Hill: Singapore.

Division of Provincial Affairs. (1993). Water resources database of central region (Volume 2). Bangkok: Department of Provincial Administration.

Faulkner, H., McCarthy, S. & Tunstall, S. (2011). Flood risk communication, In Flood Risk Science and Management (pp. 386-406). UK: Willey-Blackwell.

Kirpich, Z. P. (1940). Time of concentration of small agricultural watersheds. Civil Engineering, 10(6), 362.

Kitparnitchrun, K. & Boonmee, K. (2013). Analysis of extreme rainfall trend of Bangkok. Project of Irrigation Engineering, Department of Irrigation Engineering, Faculty of Engineering, Kasetsart University.

Roachanakanan, T. (2012). Urban disaster resilience. Retrieved from

Srivanit, M., Hokao, K. & Iamtrakul, P. (2014). Classifying thermal climate zones to support urban environmental planning and management in the Bangkok metropolitan area. Journal of Architectural Research and Studies, 11(1), 73-97.

Urban Space Stonehenge, Joint Venture. (2015). Comprehensive plan of Sam kok. Proceedings of Town and Country Planning Board, Bangkok, Thailand: Department of Public Works and Town & Country Planning.