Urban floods are becoming increasingly more frequent,which has led to tremendous economic losses.The application of inundation modeling to predict and simulate urban flooding is an effective approach for dis-aster prevention and risk reduction,while also addressing the uncertainty problem in the model is always a chal-lenging task.In this study,a cellular automaton(CA)-based model combining a storm water management model(SWMM)and a weighted cellular automata 2D inundation model was applied and a physical-based model(LIS-FLOOD-FP)was also coupled with SWMM for compari-son.The simulation performance and the uncertainty factors of the coupled model were systematically dis-cussed.The results show that the CA-based model can achieve sufficient accuracy and higher computational effi-ciency than can a physical-based model.The resolution of terrain and rainstorm data had a strong influence on the performance of the CA-based model,and the simulations would be less creditable when using the input data with a terrain resolution lower than 15 m and a recorded interval of rainfall greater than 30 min.The roughness value and model type showed limited impacts on the change of inundation depth and occurrence of the peak inundation area.Generally,the CA-based coupled model demonstrated laudable applicability and can be recom-mended for fast simulation of urban flood episodes.This study also can provide references and implications for reducing uncertainty when constructing a CA-based cou-pled model.

Zhaoyang Zeng;Zhaoli Wang;Chengguang Lai

School of Civil Engineering and Transportation,State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510641,China;Pazhou Lab,Guangzhou 510335,China;Guangdong Engineering Technology Research Center of Safety and Greenization for Water Conservancy Project,Guangzhou 510641,China

国际灾害风险科学学报（英文版）

[1]Zhaoyang Zeng;Zhaoli Wang;Chengguang Lai-.Simulation Performance Evaluation and Uncertainty Analysis on a Coupled Inundation Model Combining SWMM and WCA2D)[J].国际灾害风险科学学报（英文版）,2022(03):448-464

Inundation,WCA2D,creditable,laudable

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