气候变化领域集成服务门户(CCPortal): A novel 1D-2D coupled model for hydrodynamic simulation of flows in drainage networks

CCPortal

DOI	10.1016/j.advwatres.2020.103519
	A novel 1D-2D coupled model for hydrodynamic simulation of flows in drainage networks
	Li Q.; Liang Q.; Xia X.
发表日期	2020
ISSN	0309-1708
卷号	137
英文摘要	Drainage network modelling is often an essential component in urban flood prediction and risk assessment. Drainage network models most commonly use different numerical procedures to handle flows in pipes and junctions. Numerous numerical schemes and models of different levels of complexity have been developed and reported to predict flows in pipes. However, calculation of the flow conditions in junctions has received much less attention and has been traditionally achieved by solving only the continuity equation. This method is easy to implement but it neglects the momentum exchange in the junctions and cannot provide sufficient boundary conditions for the pipe calculation. In this work, a novel numerical scheme based on the finite volume solution to the two-dimensional (2D) shallow water equations (SWEs) is proposed to calculate flow dynamics in junctions, which directly takes into account both mass and momentum conservation and removes the necessity of implementing complicated boundary settings for pipe calculations. This new junction simulation method is then coupled with the widely used two-component pressure approach (TPA) for the pipe flow calculation, leading to a new integrated drainage network model. The new 1D-2D coupled drainage network model is validated against an experimental and several idealised test cases to demonstrate its potential for efficient and stable simulation of flow dynamics in drainage networks. © 2020 The Authors
关键词	Equations of motion Floods Risk assessment 1D-2D coupled modeling Drainage networks Hydrodynamic simulation Momentum conservations Shallow water equation (SWEs)Shallow water equations Transient flow Urban flood modelling Drainage computer simulation drainage network flooding hydrodynamics numerical model prediction shallow water transient flow
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131846
推荐引用方式 GB/T 7714	Li Q.,Liang Q.,Xia X.. A novel 1D-2D coupled model for hydrodynamic simulation of flows in drainage networks[J]. Advances in Water Resources,2020,137.
APA	Li Q.,Liang Q.,&Xia X..(2020).A novel 1D-2D coupled model for hydrodynamic simulation of flows in drainage networks.,137.
MLA	Li Q.,et al."A novel 1D-2D coupled model for hydrodynamic simulation of flows in drainage networks".137(2020).