2D Numerical Model of Flooding in East Bangkok
Publication: Journal of Hydraulic Engineering
Volume 125, Issue 4
Abstract
We propose a new numerical flooding model oriented to water systems comprising large canal networks. Our approach is based on the diffusion wave equation related to a modified version of the so-called “calculations with apparent cross-sectional flow areas.” Our mathematical formulation is based on the analogy of a porous medium characterized by a permeability depending on parameters and directions of the canal network. Next, we combine the “continuous medium” approach with the nonnegative stable numerical algorithm (initially developed for the 1D diffusion wave equation). A numerical solution of our resulting finite-difference equations requires a tangible generalization of the nonnegative algorithm to the case of coupled 2D river-surface flows. Finally, we simulate the flood evolution in the lower Chao-Praya river basin (located in the eastern areas of Bangkok), and we demonstrate the computational efficiency of our proposed method.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 125 • Issue 4 • April 1999
Pages: 407 - 414
History
Received: Dec 23, 1996
Published online: Apr 1, 1999
Published in print: Apr 1999
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