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| DOI：10.13522/j.cnki.ggps.2023376 |
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| Numerical Simulation on Influence of Dam-break Flood Based on Two-dimensional Hydrodynamic Model |
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HAN Zhongkai, CUI Kui, ZHANG Weijie, AN Kaijun, ZHANG Zhao
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Water Resources Research Institute of Shandong Province, Ji’nan 250013, China
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| Abstract: |
| 【Objective】The purpose of the paper is to study the effect of dam-break flood. 【Method】Taking Xinzhuang reservoir as an example, a two-dimensional hydrodynamic model was established to simulate the evolution process of dam-break flood under different schemes, and the water depth, velocity and erosion depth of downstream high-speed railway were calculated, so as to analyze the impact of dam-break flood on the safe operation of downstream high-speed railway. 【Result】The results showed that the maximum discharge flood of the spillway could pass through the railway culvert normally when the reservoir was not breached, and it had little impact on downstream project. The impact of dam break on the front was greater than that on the side, the top surface of partial railway embankment overflowed and affected the normal operation of railway. Compared with the normal condition, the maximum flow velocity was 2.15~2.48 times and the maximum scouring depth at the culvert is 1.56 times. 【Conclusion】The two-dimensional hydrodynamic model can be used to simulate the evolution process and submerged area of dam-break flood, and the research results can provide reference and data support for the prevention of dam-break flood. |
| Key words: dam-break flood; two-dimensional hydrodynamic model; submerged depth; erosion depth |
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