Optimal evacuation scheme based on dam-break flood numerical simulation |
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| Authors: | Xiaoling Wang Ruirui Sun Zhengyin Zhou and Ling Huang |
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| Institution: | (1) State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, 210093, China;(2) State Key Laboratory of Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing, 210029, China; |
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| Abstract: | The optimal evacuation scheme is studied based on the dam-break flood numerical simulation. A three-dimensional dam-break
mathematical model combined with the volume of fluid (VOF) method is adopted. According to the hydraulic information obtained
from numerical simulation and selecting principles of evacuation emergency scheme, evacuation route analysis model is proposed,
which consists of the road right model and random degree model. The road right model is used to calculate the consumption
time in roads, and the random degree model is used to judge whether the roads are blocked. Then the shortest evacuation route
is obtained based on Dijstra algorithm. Gongming Reservoir located in Shenzhen is taken as a case to study. The results show
that industrial area I is flooded at 2 500 s, and after 5 500 s, most of industrial area II is submerged. The Hushan, Loucun
Forest and Chaishan are not flooded around industrial area I and II. Based on the above analysis, the optimal evacuation scheme
is determined. |
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| Keywords: | three-dimensional dam-break numerical model volume of fluid method evacuation route analysis model evacuation scheme |
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