DOI: 10.1007/s11069-021-04899-z
论文题名: Coupling a 1D-local inertia 2D hydraulic model for flood dispatching simulation in a floodplain under joint control of multiple gates
作者: Li D. ; Chen S. ; Zhen Z. ; Bu S. ; Li Y.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
语种: 英语
中文关键词: Convective acceleration terms
; Coupled 1D–2D model
; Flood dispatching
; Grid scale
; Local inertial equations
英文摘要: A 2D local inertial equations model coupled with a 1D hydraulic model was established to simulate flood dispatching in river and flood detention areas. A simplified first-order accuracy finite volume method (FVM) solution was applied to the 2D model, and the source-type linking method was used at the coupling zones. The coupled model was calibrated by the historical flood process in the Daqing River basin, satisfactory agreements were obtained at the gauge points, and the flood arrival time was consistent with the recorded data. A flood dispatching simulation in the scenario of joint control of multiple gates was then performed. The operation sequence of the corresponding gates and the flood routing in each sub-basin were consistent with the dispatch rules. The convergence analysis based on the grid scale and convective acceleration terms was presented. The results indicated that a refined grid-scale yields better accuracy of the numerical solution, but this improvement is constrained by the resolution of the digital elevation model (DEM). In the lower range of Fr, the results of the hydraulic variables and the flood behaviours obtained by the local inertial equations model are identical to those of the full shallow-water equations (SWEs) model, which suggests that the approximation based on neglecting the convective acceleration terms is reasonable for the practical case of low velocity combined with an insignificant depth gradient. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169158
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300350, China; Center of Eco-environmental Monitoring and Scientific Research, Administration of Ecology and Environment of Haihe River Basin and Beihai Sea Area, Ministry of Ecology and Environment of People’s Republic of China, Tianjin, 300061, China
Recommended Citation:
Li D.,Chen S.,Zhen Z.,et al. Coupling a 1D-local inertia 2D hydraulic model for flood dispatching simulation in a floodplain under joint control of multiple gates[J]. Natural Hazards,2021-01-01