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http://dx.doi.org/10.3741/JKWRA.2019.52.5.361

Development and evaluation of a 2-dimensional land surface flood analysis model using uniform square grid  

Choi, Yun-Seok (Department of Land, Water and Environment Research, Korea Institute of Construction Technology)
Kim, Joo-Hun (Department of Land, Water and Environment Research, Korea Institute of Construction Technology)
Choi, Cheon-Kyu (Department of Land, Water and Environment Research, Korea Institute of Construction Technology)
Kim, Kyung-Tak (Department of Land, Water and Environment Research, Korea Institute of Construction Technology)
Publication Information
Journal of Korea Water Resources Association / v.52, no.5, 2019 , pp. 361-372 More about this Journal
Abstract
The purpose of this study is to develop a two-dimensional land surface flood analysis model based on uniform square grid using the governing equations except for the convective acceleration term in the momentum equation. Finite volume method and implicit method were applied to spatial and temporal discretization. In order to reduce the execution time of the model, parallel computation techniques using CPU were applied. To verify the developed model, the model was compared with the analytical solution and the behavior of the model was evaluated through numerical experiments in the virtual domain. In addition, inundation analyzes were performed at different spatial resolutions for the domestic Janghowon area and the Sebou river area in Morocco, and the results were compared with the analysis results using the CAESER-LISFLOOD (CLF) model. In model verification, simulation results were well matched with the analytical solution, and the flow analyses in the virtual domain were also evaluated to be reasonable. The results of inundation simulations in the Janghowon and the Sebou river area by this study and CLF model were similar with each other and for Janghowon area, the simulation result was also similar to the flooding area of flood hazard map. The different parts in the simulation results of this study and the CLF model were compared and evaluated for each case. The results of this study suggest that the model proposed in this study can simulate the flooding well in the floodplain. However, in case of flood analysis using the model presented in this study, the characteristics and limitations of the model by domain composition method, governing equation and numerical method should be fully considered.
Keywords
Flood analysis model; 2-Dimensional; Uniform square grid; Finite volume method; Parallel computing;
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