NUMERICAL SIMULATION OF FLOODING AND DRYING IN A DEPTH-AVERAGED TIDAL FLOW MODEL
NUMERICAL SIMULATION OF FLOODING AND DRYING IN A DEPTH-AVERAGED TIDAL FLOW MODEL
复制标题
深度平均潮汐流模型中淹没和干燥的数值模拟
DOI：
10.1680/iicep.1987.346
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发表时间：
1987
期刊：
影响因子：
11.2
通讯作者：
P. H. Owens
中科院分区：
文献类型：
--
作者：
R. Falconer;P. H. Owens
描述了一种精细的数值模拟方案，用于模拟重复潮汐作用下浅水河口河段的洪水和干涸。人们的兴趣集中在开发一种可以应用于相对较大的网格空间和时间步进模型的技术，这种技术可能特别与嵌套流体动力学建模有关。详细给出了在模拟洪水和干燥的两种不同方法中获得的水高度预测的比较，对于具有均匀倾斜床和极端网格和时间步长的理想一维河口。作为这些比较的结果，提出了一种特别适用于时间限制较少的隐式模型的改进方案。将该方法应用于亨伯河口的二维粗网格模型。预测的水位高度和深度平均流速与在河口沿线四个特定地点进行的实地测量结果相比较是有利的，这表明该技术是对早期方案的改进，该方案对亨伯河口给出了不稳定的结果。
A refined numerical modelling scheme to simulate the flooding and drying of shallow estuarine reaches by repetitive tides is described. Interest has been focused on developing a technique which can be applied to relatively large grid space and time step models, and which may be particularly relevant to nested hydrodynamic modelling. Details are given of comparisons of water elevation predictions obtained for two different approaches in modelling flooding and drying, for an idealised one-dimensional estuary with a uniformly sloping bed and with extreme grid and time step sizes. As a result of these comparisons, a refined scheme which is particularly relevant to less time restrictive implicit models has been proposed. The proposed flooding and drying simulation technique has been applied to a two-dimensional coarse grid model of the Humber Estuary. The predicted water elevations and depth mean velocities have compared favourably with field measurements taken at four specific sites along the estuary, which would suggest that the technique is an improvement on an earlier scheme that gave unstable results for the Humber Estuary.