Abstract
A well-balanced finite volume method for solving two-dimensional shallow water equations with weighted average flux (WAF) is developed in this work to simulate flooding. Friction source terms are estimated with a semi-implicit scheme resulting in an efficient numerical method for simulating shallow water flows over irregular domains, for both wet and dry beds. A wet/dry cell tracking technique is also presented for reducing computational time. The accuracy of these methods are investigated by application to well-studied cases. For practical purposes, the developed scheme is applied to simulate the flooding of the Chao Phraya river from Chai Nat to Sing Buri provinces in Thailand during October 13–17, 2011. The numerical simulations yield results that agree with the existing data obtained from the satellite images.
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Thida Pongsanguansin is supported by the Science Achivement Scholarship Thailand (SAST).
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Pongsanguansin, T., Maleewong, M. & Mekchay, K. Shallow-water simulations by a well-balanced WAF finite volume method: a case study to the great flood in 2011, Thailand. Comput Geosci 20, 1269–1285 (2016). https://doi.org/10.1007/s10596-016-9589-9
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DOI: https://doi.org/10.1007/s10596-016-9589-9